38 C.F.R. § 21.42
The basic period of eligibility does not run as long as any of the following reasons prevents the veteran from commencing or continuing a vocational rehabilitation program:
(a) Qualifying compensable service-connected disability(ies) not established. The basic period of eligibility does not commence until the day VA notifies a veteran of a rating determination by VA that the veteran has a qualifying compensable service-connected disability under § 21.40.
(Authority: 38 U.S.C. 3103(b)(3))
(b) Character of discharge is a bar to benefits.
(2) If VA has considered a veteran's character of discharge to be a bar to benefits, the basic period of eligibility commences only when one of the following happens:
(3) If there is a change in the character of discharge, or the discharge or release otherwise is determined, as provided in paragraph (b)(2) of this section, not to be a bar to benefits, the beginning date of the basic period of eligibility will be the effective date of the change or VA determination.
(Authority: 38 U.S.C. 3103(b)(2))
(c) Commencement or continuation of participation prevented by medical condition(s).
(2) For purposes of this section, the term disabling effects of chronic alcoholism means alcohol-induced physical or mental disorders or both, such as habitual intoxication, withdrawal, delirium, amnesia, dementia, and other like manifestations that:
(6) If the basic period of eligibility is delayed or interrupted under this paragraph (c) due to any medical condition(s) of the veteran, it will begin or resume on the date a Counseling Psychologist (CP) or Vocational Rehabilitation Counselor (VRC) notifies the veteran in writing that the CP or VRC has determined, based on the evidence of record, that participation in a VR&E program is reasonably feasible for the veteran.
(Authority: 38 U.S.C. 3103(b)(1))
[75 FR 3166, Jan. 20, 2010, as amended at 87 FR 8742, Feb. 16, 2022]