38 C.F.R. § 21.52
(a) Requirements for determining serious employment handicap. For each individual who is found to have an employment handicap, a CP or VRC must make a separate determination of whether the individual has a serious employment handicap. For the purposes of an initial evaluation under § 21.50, a serious employment handicap will be found to exist only if a CP or VRC determines that the individual meets each of the following conditions:
(2) Effects of significant impairment not overcome. The individual has not overcome the effects of the significant vocational impairment through employment in, or qualifying for employment in, an occupation consistent with his or her abilities, aptitudes, and interests. This includes an individual who qualifies for a suitable job, but who does not obtain or keep the job for reasons beyond his or her control.
(Authority: 38 U.S.C. 3102)
(3) Contribution of the service-connected disability(ies) to the individual's overall significant vocational impairment.
(i) Except as provided in paragraph (a)(3)(ii) of this section, the service-connected disability(ies) must contribute in substantial part to the individual's overall significant vocational impairment. This means that the disability(ies) must have an identifiable, measurable, or observable causative effect on the overall significant vocational impairment, but need not be the sole or primary cause of the serious employment handicap.
(Authority: 38 U.S.C. 3101)
(b) Factors for assessment during the initial evaluation, when determining whether a significant vocational impairment exists. The combination of all restrictions and their effects on the individual define the extent of the vocational impairment and its significance. When determining whether the individual has a significant vocational impairment, VA will develop and assess the following factors and their effects:
(9) Other factors that relate to preparing for, obtaining, or keeping employment consistent with the individual's abilities, aptitudes, and interests.
(Authority: 38 U.S.C. 3102, 3106)
[72 FR 14043, Mar. 26, 2007]