; and (C) uniform legal and evidentiary standards of proof of public acceptance of Federal R.S. 2477 right-of-way grants; (3) recognizing and protecting valid existing rights; and (4) requiring that any actions by a successful claimant improving, upgrading or expanding an R.S. 2477 right-of-way are conditioned upon consultation with the Secretary. 3. Definitions In this Act: (1) Abandon or abandonment The terms abandon and abandonment mean formal action by the governing body of a claimant taken at a public meeting pursuant to notice that declares all of claimant’s right, title, and claim to a R.S. 2477 right-of-way is relinquished. (2) Acceptance or accepted The terms acceptance and accepted mean acts on the part of a claimant sufficient to manifest an intent to accept the open congressional offer under R.S. 2477 right-of-way, including— (A) a positive or affirmative action by a State or county governmental authority on or before October 21, 1976, including— (i) a formal resolution or declaration of ownership of, or responsibility for maintaining, a highway; or (ii) the inclusion of a highway in an official map that reflects such ownership or maintenance responsibility; (B) the construction, improvement, repair or maintenance of a highway by a State or county governmental authority, or private party on or before October 21, 1976