36 CFR Part 1194 - Proposed Information and Communication Technology (ICT) Standards and Guidelines NPRM - Preamble

C. Functional Performance Criteria

The functional performance criteria are outcome-based provisions that address barriers to using ICT by individuals with certain disabilities, such as those related to vision, hearing, color blindness, speech, and manual dexterity. Both the existing 508 Standards and 255 Guidelines provide functional performance criteria. However, the existing 508 Standards do not expressly define the relationship between its functional performance criteria and technical requirements. To address this gap, the Board proposes to clarify when application of the functional performance criteria in the 508 Standards is required. (We are not proposing to change the application of the functional performance criteria in the 255 Guidelines.) The Board also proposes, in this NPRM, to update several functional performance criteria in Chapter 3 to refine some criteria and to make editorial changes necessitated by revisions elsewhere in the proposed rule.

1. Application of Functional Performance Criteria: 508 Standards

Section 1194.31 of the existing 508 Standards, which sets forth six specific functional performance criteria, does not specify when federal agencies and other covered entities should or must apply these criteria. As described in the preamble to the final rule for the existing standards:

This section [1194.31] provides functional performance criteria for overall product evaluation and for technologies or components for which there is no specific requirement under other sections. These criteria are also intended to ensure that the individual accessible components work together to create an accessible product. (65 FR 80519 (Dec. 21, 2000))

Over the ensuing years, some have raised questions about application of the functional performance criteria in the existing 508 Standards. The General Services Administration’s IT Accessibility and Workforce (GSA/ITAW)—which is the federal government’s principal coordinator for Section 508 implementation—provides the following information in a “Q &A” format concerning application of the functional performance criteria:

How should an agency proceed in identifying “applicable" technical provisions in Subparts B [technical provisions], C [functional performance criteria], and D [information, documentation, and support] of the Access Board’s standards to ensure acquired products provide comparable access?

Agencies should first look to the provisions in Subpart B [technical provisions] to determine if there are specific technical provisions that apply to the [ICT] need they are seeking to satisfy.

If there are applicable provisions in Subpart B [technical provisions] that fully address the product or service being procured, then the agency need not look to Subpart C [functional performance criteria]. Acquired products that meet the specific technical provisions set forth in Subpart B [technical provisions] will also meet the broader functional performance criteria in Subpart C [functional performance criteria].

If an agency’s procurement needs are not fully addressed by Subpart B [technical provisions], then the agency must look to Subpart C [functional performance criteria] for applicable functional performance requirements.⁵

The GSA/ITAW’s Q&A document also suggests that the functional performance criteria in the existing 508 Standards be used to evaluate ICT products for equivalent facilitation. Id.

As recounted previously, the Board’s approach to specifying requirements for application of the functional performance criteria has evolved over the course of this rulemaking. The Advisory Committee recommended that the Board clarify the relationship between the functional performance criteria and the technical provisions in the 508 Standards, but did not reach consensus on how to address this issue. In the 2010 ANPRM, the Board proposed to use the approach suggested in the GSA/ITAW’s Q&A document—namely, that agencies first look to the technical provisions in the 508 Standards to determine whether there were specific provisions that applied to the ICT being procured. If there were technical provisions that fully addressed the ICT being procured, then the agency would not need to apply the functional performance criteria. Application of the functional performance criteria would thus only be required under the following two circumstances: when the agency’s procurement needs were not fully addressed by technical provisions in the 508 Standards, or when evaluating ICT for equivalent facilitation. This proposal was intended to reflect current agency practice.

Concerns expressed by commenters led the Board to propose redefining the relationship between the functional performance criteria and the technical provisions in the 508 Standards. In the 2011 ANPRM, the Board proposed that ICT would be required to conform to the functional performance criteria, even when the technical provisions were met. This proposal, too, received mixed reviews from commenters. While some commenters supported this approach, industry groups objected to it as unworkable. They viewed the functional performance criteria as overly subjective and not subject to objective testing. As one commenter from the IT industry noted: “[A] supplier cannot guarantee that the functional performance criteria have been met unless the supplier controls all the components of the end-to-end solution.”

In this NPRM, the Board heeds the concerns of industry groups and effectively returns to our original proposal whereby the functional performance criteria in the 508 Standards apply only in two specific circumstances—when there are “gaps” in the technical requirements and when evaluating equivalent facilitation. Specifically, agencies would be required to apply the functional criteria as follows. First, where the proposed requirements in Chapter 4 for hardware and Chapter 5 for software do not address one or more of the features of ICT, sections E204.1 and C202.1 would require the features that are not addressed in those chapters to conform to the functional performance criteria in Chapter 3. This is consistent with the GSA/ITAW’s recommended approach under the existing 508 Standards. It is also consistent with §§ 1193.21 and 1193.41 of the existing 255 Guidelines. Second, section E101.2 proposes to require the functional performance criteria to be used when evaluating ICT for equivalent facilitation. This is consistent with the GSA/ITAW’s recommended approach under the existing 508 Standards.

With respect to the 255 Guidelines, neither the Advisory Committee (in its TEITAC Report) nor the Board (in the 2010 and 2011 ANPRMs) previously proposed any changes to the manner in which telecommunications equipment manufacturers must apply the functional performance criteria. Likewise, the Board proposes no changes in this NPRM. See Section VI.D (Section-by-Section Analysis – Functional Performance Criteria and Technical Requirements - C201.3 and C202).

2. Updates to Functional Performance Criteria: 508 Standards and 255 Guidelines

As noted above, the Board is also proposing in this NPRM to update several functional performance criteria in Chapter 3 (located in Appendix C – Technical Requirements)—which applies to both the 508 Standards and the 255 Guidelines—by refining some criteria and making editorial changes necessitated by revisions elsewhere in the proposed rule. We highlight below several of the principle revisions to the functional performance criteria proposed in this NPRM. In addition, Table 3, which follows at the end of this section, provides a detailed comparison of the functional performance criteria in the existing 508 Standards (§ 1194.31), 255 Guidelines (1193.41), and the proposed rule (section 302).

First, while the functional performance criteria in proposed 302 no longer reference assistive technology, this amounts to an editorial change only. The existing 508 Standards and 255 Guidelines allow certain functional performance criteria to be satisfied either directly or indirectly through support for assistive technology. (See, e.g., existing 508 Standards §§ 1194.31(a) – (e)). The functional performance criteria in the proposed rule do not provide for compliance through support for assistive technology because other proposed revisions to the 508 Standards (E203.1) and 255 Guidelines (C201.3) would impose a general requirement that agencies and telecommunications equipment manufacturers respectively ensure that all functionality of ICT is accessible to and usable by individuals with disabilities, either directly or by supporting the use of assistive technology.

Second, as discussed in Section IV.E.6, the Board proposes to revise the criteria for users with limited vision in section 302.2. The existing 508 Standards require at least one mode of operation and information retrieval that does not require visual acuity greater than 20/70 to be provided in audio and enlarged print output working together or independently. The existing 255 Guidelines are similar, except that they define users with limited vision as users possessing visual acuity that ranges between 20/70 and 20/200. The proposed rule would require at least one mode of operation that magnifies, one mode that reduces the field of vision required, and one mode that allows user control of contrast where a visual mode of operation is provided. The proposed rule does not refer to visual acuity since comments in response to proposals in the 2010 and 2011 ANPRMs recommended that the criteria should address features that would improve accessibility for users with limited vision instead of using visual acuity as a measure of limited vision.

Third, there are two functional performance provisions in the existing 255 Guidelines that are not found in the functional performance criteria for existing 508 Standards: operations without time-dependent controls (255 Guidelines § 1193.41(g)) and operations with limited cognitive skills (255 Guidelines §1193.41(i)). There is a technical provision in the existing 508 Standards that corresponds to 255 Guidelines § 1193.41(g) requiring the operation of ICT without time-dependent controls (508 Standards §1194.22(p)). This is addressed in the proposed rule in WCAG 2.0 Success Criteria 2.2.1 Timing Adjustable and 2.2.2 Pause, Stop and Hide. We propose to incorporate by reference WCAG 2.0 Success Criteria in proposed E207.2 and C205.2.

Fourth, the Board proposes not to include a functional performance criteria relating to limited cognitive skills. The existing 255 Guidelines provide a criterion for at least one mode of operation that minimizes cognitive skills required of the user (§ 1193.41(i)), while the existing 508 Standards have no parallel provision. Such a criterion has not been included in the proposed rule on the advice of the Advisory Committee, which recommended deletion of this criteria pending future research. (See Section VI.C (Section-by-Section Analysis - Application and Scoping).

Table 3 below provides a provision-by-provision summary of how the proposed rule would revise the existing functional performance criteria by comparing the criteria in proposed 302 (in the left-hand column of the table) to its counterparts in existing 508 Standards § 1194.31 (in the middle column of the table) and existing 255 Guidelines §1193.41 (in the right-hand column of the table).

Table 3 - Comparison of the Functional Performance Criteria in the NPRM and Existing 508 Standards and 255 Guidelines

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