my old jw dad was an authorised person--which meant he used to attend jw weddings in the Birmingham UK area to do the form filling at weddings. this was in the time frame early 70's to mid 80's. he kept records for years in a strongbox.
he told me of one ceremony where the elder conducting was departing from the formal words the couple had to repeat; he had to interrupt and insist the elder used the correct words in the correct sequence. the elder was not a happy bunny.