Md. Code Ann., Com. Law § 22-301
Terms with respect to which confirmatory records of the parties agree or which are otherwise set forth in a record intended by the parties as a final expression of their agreement with respect to terms included therein may not be contradicted by evidence of any previous agreement or of a contemporaneous oral agreement but may be explained or supplemented by:
Added by Acts 2000, c. 11, § 1, eff. Oct. 1, 2000.