Landlord Law

4.3.3

4. Property management
4.3 Tenancy management
4.3.3 Service charge
If administering a service charge, refer to the 4.3.3 Service charge
If administering a service charge, refer to the RICS Service charge (residential) management code for
guidance, as this is outside the scope of this Code. for guidance, as this is outside the scope of this Code.

You should be able to find the code here.