1. Wholesale Revenue Metering Standard - Hardware November 2003

2. Meter Enclosure All meters, test links, and fuses shall be contained within a meter enclosure. The communication equipment, such as an external modem or a telephone line switcher, may be located in a separate locked enclosure under strict control of the MMP provided that the equipment is supplied from an external power source; … otherwise the communication equipment shall be contained in the meter enclosure. 10.1 New Installations

3. Meter Enclosure - New MI (continued) 10.1.2 Meter Enclosure Requirements : Secured and sealed by MSP, in a manner approved by IMO Accessible to MSP at all times… not accessible to others Seals to be placed to ensure detection of unauthorized access to IT connections, meter, test links, test-link cover and fuses Seals individually numbered, …traceable to the MSP

4. Market Rules Chapter 6 - Appendix 6.1 Metering Obligations Metering Service Providers

5. MSP Obligations 1.3.1 The following activities shall be performed by registered MSPs 1.3.1.1 the provision, installation, commissioning, maintenance, repair, replacement, inspection and testing of metering installations 1.3.1.2 the registration of metering installations with the IMO and the preparation of all meter point documentation and other [support]documentation … for registration; and 1.3.1.3 the resolution of trouble calls relating to metering installations and metering data in accordance with sections 1.3.2.14 and 1.3.2.15 of this Appendix.

6. MSP Obligations The registered MSP has the responsibility to ensure all the requirements of section 1.3.1 are satisfied. Some MSP function related activities could be performed by contractors, MMPs, etc. The MSP cannot delegate this responsibility. ***

7. MSP Obligations Sample activities related to the provision, installation, maintenance, repair, replacement, but not registration of MI, commissioning of the MI, inspection & testing of MI, and resolution of MTRs are: Provision and installation of ITs, meters, meter enclosures, test blocks, communications, cabling. Maintenance, repair and replacement of metering equipment and MI.