Acceptance is implied by demonstrating any act indicating a person's assent to the proposed bargain. The power to withhold royal assent to Bills is controversial. To the condemnation of Nestorius he could not assent. The last stage of a bill involves the granting of the Royal Assent. William IV's royal assent to the Slavery Abolition Act. Mere silence cannot amount to any assent. He met and persuaded Narayan to give his assent to the project. She gave her assent for his pardon in writing. Once approved in Parliament, the measure became law on receiving the royal assent. Both parts deal with assent or belief. The Act was repealed and replaced by the Royal Assent Act 1967. The situation of retrospectively regularising legislation passed without Royal Assent had to be dealt with. This represents not a mutual mistake but a failure of mutual assent. Some monarchical states call this procedure "royal assent". Each act is numbered consecutively based on the date they received royal assent.