VRS7050 - Bespoke schemes: practical guidance: Introduction
Notice 727/2 Bespoke retail schemes provides information for both businesses and assurance staff on the specific elements to be considered/included in bespoke schemes.
But you should take care not to include anything in an agreement letter that is unnecessary by virtue of being already covered by legislation - liability issues, for example. If you do include something of this nature, and the law changes, the business might not be affected by the change. Both parties will be bound by the scheme agreement until the agreement itself is changed.