Rights and privileges under other law, etc. not affected

69. Nothing in this Act shall affect any rights or privileges which an employee in any establishment is entitled to at the date this Act comes into force in a local area, under any other law, contract, custom or usage applicable to such establishment or any award, settlement or agreement binding on the employer and the employee in such establishment, if such rights or privileges are more favourable to him than those to which he would be entitled under this Act.