Registration on balancing market (BM) and ancillary services market (ASM) The Registry on the Balancing Market is described in Paragraph 4.2 of the Market Rules and establishes the procedure to join the Agreement on Provision of Balancing ServicesThe Registry of ancillary service providers is described in Paragraph 3.2 of the Market Rules and establishes the procedure to join the Agreement of Provision of Ancillary Services