H.R. 3874, the Veterans Education Assistance Improvement Act, makes several administrative changes to veterans' education benefits programs under the Department of Veterans Affairs. The bill ensures that veterans using Post-9/11 GI Bill benefits receive their full monthly housing stipend even during their final semester of enrollment, treating them as full-time students regardless of actual course load for housing allowance purposes. The legislation also requires the VA to provide 180 days' advance notice to students, educational institutions, and Congress before implementing new rules affecting education assistance programs, with this requirement taking effect on August 1, 2024. Additionally, the bill extends the notice period schools must receive before risk-based surveys from one business day to two business days, and allows the VA to grant multi-year waivers to educational institutions rather than requiring annual renewals. These changes take effect on the bill's enactment date or August 1, 2023, depending on the provision.