Some instruments come into force when made, but most contain express provision bringing them into force at a later date (if no later date is given, the default assumption is that an instrument comes into force at the moment of making). The time when an instrument comes into force is known as its ‘commencement’
When this gets actualised is dependent on the procedure that the SI is laid under, please check flowcharts before actualising. September 2020 - a discussion took place between IDMS and Daniel Greenberg about made affirmatives laid under the Local Government Finance Act 1988. They are made without a number and are not effective until the Local Government Finance report for England is approved. The discussions led to what 'in effect' and 'into force' mean with Greenberg suggesting they mean different things. After discussion we've established that 'comes into force' is the instruction that makes an instrument effective and therefore ‘comes into force’ is enough for our maps.
Equals CiF date, if there is one; if CiF is covered by note, no date should be added to the business item