MARRIAGE ACT 1835 MARRIAGE ACT 1835 - LONG TITLE An Act to render certain Marriages valid, and to alter the Law with respect to certain voidable Marriages.{1} [31st August 1835] Preamble rep. by SLR (NI) 1954 S.1 rep. by SLR (NI) 1954 MARRIAGE ACT 1835 - SECT 2 Marriages of persons within prohibited degrees, void. 2. All marriages which shall hereafter be celebrated between persons within the prohibited degrees of consanguinity or affinity shall be absolutely null and void to all intents and purposes whatsoever. S.4 rep. by SLR 1874