I doubt the Council has instructed you. They have probably suggested that you will get a discount on your selective licence if you do become accredited. Check with their website which accreditation schemes they recognise.
Accreditation must be verified through membership in recognised associations such as the … or the ….
So that tells you where to go. However, bear in mind that accreditation with the latter involves you gaining 5 core CPD points and that you have to pay £55 and spend some time doing elearning courses. Not sure how much time you have to throw at that or whether that expense will offset your discount.
Any costs including my time incured by this RRB or other legislation will be divided up and added to my tennants rents, this is the 5hit5torm this govt have created.