"Group 6 - Residential Conversions Item No 1. The supply, in the course of a qualifying conversion, of qualifying services relating to the conversion. 2. The supply of building materials if (a) the materials are supplied by a person who, in the course of a qualifying conversion, is supplying qualifying services related to the conversion, and (b) those services include the incorporation of the materials in the building concerned or its immediate site. NOTES Meaning of "qualifying conversion"