CAP 804, Section 4, Part H refers to the differences required under EASA.
However, the privilege to fly microlights using a SEP rating and the national requirements to do so are provided under national legislation. Therefore you need to look in the NPPL section...
See CAP 804, Section 5, Part A, Subpart 2, page 8:
3.1 4 Exercising the privileges on Microlight aeroplanes on the basis of an SEP(Land) Class Rating...
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