29 CFR Part 1630, Regulations to Implement the Equal Employment Provisions of the ADA (Title I Regulations with amendments issued through May 2016)

(1) Rules of construction. The following rules of construction apply when determining whether an impairment substantially limits an individual in a major life activity:

(i) The term “substantially limits” shall be construed broadly in favor of expansive coverage, to the maximum extent permitted by the terms of the ADA. “Substantially limits” is not meant to be a demanding standard.

(ii) An impairment is a disability within the meaning of this section if it substantially limits the ability of an individual to perform a major life activity as compared to most people in the general population. An impairment need not prevent, or significantly or severely restrict, the individual from performing a major life activity in order to be considered substantially limiting. Nonetheless, not every impairment will constitute a disability within the meaning of this section.

(iii) The primary object of attention in cases brought under the ADA should be whether covered entities have complied with their obligations and whether discrimination has occurred, not whether an individual's impairment substantially limits a major life activity. Accordingly, the threshold issue of whether an impairment “substantially limits” a major life activity should not demand extensive analysis.

(iv) The determination of whether an impairment substantially limits a major life activity requires an individualized assessment. However, in making this assessment, the term “substantially limits” shall be interpreted and applied to require a degree of functional limitation that is lower than the standard for “substantially limits” applied prior to the ADAAA.

(v) The comparison of an individual's performance of a major life activity to the performance of the same major life activity by most people in the general population usually will not require scientific, medical, or statistical analysis. Nothing in this paragraph is intended, however, to prohibit the presentation of scientific, medical, or statistical evidence to make such a comparison where appropriate.

(vi) The determination of whether an impairment substantially limits a major life activity shall be made without regard to the ameliorative effects of mitigating measures. However, the ameliorative effects of ordinary eyeglasses or contact lenses shall be considered in determining whether an impairment substantially limits a major life activity.

(vii) An impairment that is episodic or in remission is a disability if it would substantially limit a major life activity when active.

(viii) An impairment that substantially limits one major life activity need not substantially limit other major life activities in order to be considered a substantially limiting impairment.

(ix) The six-month “transitory” part of the “transitory and minor” exception to “regarded as” coverage in §1630.15(f) does not apply to the definition of “disability” under paragraphs (g)(1)(i) (the “actual disability” prong) or (g)(1)(ii) (the “record of” prong) of this section. The effects of an impairment lasting or expected to last fewer than six months can be substantially limiting within the meaning of this section.