Ongoing Membership After being granted membership initially, a member will have a further building verified every three years. Clearly, where a member has only one development or a small portfolio, re-verification of the same property may become necessary as part of the continuing verification process. However, for larger suppliers, a number of buildings are selected from their portfolio for inspection within each three-year period of membership to ensure that a cross-section of their properties (including size, location and type) is verified. The National Codes Administrator (NCA) submits proposals to the Audit Panel for approval of which developments to verify and when. Verification visits triggered by complaints/concerns Complaints or concerns received by the NCA can trigger additional verification visits. A request from a Consortium member for additional verification must be considered by the Audit Panel.