Sec. 403. (a) Section 1661(a) of title 38, United States Code, is amended by adding at the end thereof a new sentence as follows: “In the case of any person serving on active duty on December 31, 1976, or a person whose eligibility is based on section 1652(a)(1)(B) of this chapter, the ending date for computing such person’s entitlement shall be the date of such person’s first discharge or release from active duty after December 31, 1976.”. (b) Section 1662 of title 38, United States Code, is amended by inserting at the end thereof the following new subsection: “(e) No educational assistance shall be afforded any eligible veteran under this chapter or chapter 36 of this title after December 31, 1989.”.