Compliance with Authority directives

In plain language

If the Authority issues a directive to you as a holder of an aviation safety instrument (such as a drone permit), you must comply with that directive immediately once it takes effect.

Requirement as structured

The holder of an aviation safety instrument must comply with any directive given by the Authority as soon as it takes effect.

Original regulatory text

the holder of any aviation safety instrument, according to the circumstances of the case, to do, or not to do, such things as are specified in the directive... and that holder must comply with that directive as soon as it takes effect.