The Planning Inspectorate has published a number of guidance documents:
1.Checklist for Planning Obligations. This is aimed at those dealing with appeals and inquiries where section 106 obligations are required to be submitted to the Inspector. It provides a useful summary of the main provisions and some practical guidance, but it is specifically aimed at the inquiries process.
3.Guidance for Inspectors on conditions and obligations
4.Guidance on appeal procedures and enforcement procedures. These procedures can be viewed as pdf documents here.