You must publish monthly notices of alteration on the first working day of each month, however you are not required to issue a monthly notice of alteration in the month you are publishing the revised register or in the two months before that day, but may do so if you wish.1
If the register is published in November this means you are not required to publish a monthly notice of alteration in September, October and November. If it is published in December, you are not required to publish a monthly notice of alteration in October, November and December.
We have published a document showing when monthly updates must be published, and, based on those dates, when applications must be made and when they must be determined by you for inclusion in a particular monthly update, or in an election notice of alteration.