Schedule 1 SINGLE-PHASE CREDIT METERS
| (1) | (2) | (3) |
|---|---|---|
| Type of Meter | Certified | Period of Certification |
| UV (SR/LR) | Before 31st December 1977 | 20 years |
| UVA (SR/LR) | On or after 31st December 1977 | 15 years |
| UVB (SR/LR) | On or after 31st December 1977 | 15 years |
| UVE (SR/LR) | On or after 31st December 1977 | 15 years |
| HM (SR/LR) | On or after 31st December 1977 | 15 years |
| HMT (SR/LR) | On or after 31st December 1977 | 15 years |
| AR (SR/LR) | On or after 31st December 1977 | 15 years |
| eI (SR/LR) | On or after 31st December 1977 | 15 years |
| NF5 (MCR with cyclometer registers) | On or after 1st January 1972 | 15 years |
| ZE (SR/LR) | On or after 1st January 1972 | 15 years |
| ZEA (SR/LR) | On or after 1st January 1972 | 15 years |
| ZEB (SR/LR) | On or after 1st January 1972 | 15 years |
| HMT (MCR) | ||
| eN (MCR) | On or after 1st January 1972 | 15 years or until 31st December 1999 if earlier |
| Any type of single-phase credit meter not described above | On or after 1st January 1966 | 20 years |