38 CFR § 3.960 - Section 306 and old-law pension protection.
(a) General. Except as provided in paragraphs (b) and (c) of this section, any person eligible to elect improved pension under § 3.711 or 3.712 who is in receipt of section 306 or old-law pension on December 31, 1978, shall in the absence of an election to receive improved pension, continue to receive such pension at the monthly rate payable on December 31, 1978.
(b) Termination. Pension payable under paragraph (a) of this section shall be terminated for any one of the following reasons:
(1) A veteran pensioner ceases to be permanently and totally disabled.
(6) A section 306 pensioner has a net worth of such size that it is reasonable that some part of it be consumed for the pensioner's maintenance. Evaluation of net worth shall be made under § 3.263.
(c) Reduction. The pension rate payable under paragraph (a) of this section shall be reduced by the amount of any additional pension payable by reason of a dependent upon the loss of such dependent. A veteran or surviving spouse who no longer has any dependents shall not continue to receive either section 306 pension or old-law pension if countable annual income exceeds the appropriate rate in § 3.26(a), (b), or (c).
(d) Finality of termination. Termination of section 306 pension or old-law pension for one of the reasons listed in paragraph (b) of this section precludes a person from thereafter establishing entitlement under any other pension program except the improved pension program.