There are many federal directives on the effective date of a VA claim. This is a complex area and you may need an attorney if you appeal to the Board of Veteran Appeals (BVA) on you effective date of a claim.
Before you submit an appeal for an effective date change, become familiar with these federal directives and court cases,
5. 38 U.S.C. § 5110 9b)(2) and (b)(3)(A)
. . . [o]nce an effective date has become final due to the failure of a claimant to appeal it, a claimant’s only recourse is to have the final decision revised on the grounds of clear and unmistakable error (CUE).
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