PPS 10 Telecommunications·Page 24·6.31
ICNIRP Compliance Declaration Requirements
All applications for mobile telecommunications base stations must include a declaration that the apparatus will meet ICNIRP public exposure guidelines when operational. Where additional antennas are added to existing masts, cumulative exposure must be confirmed not to exceed ICNIRP guidelines.
All new mobile phone base stations in the UK are expected to meet the ICNIRP public exposure guidelines. However all applications for mobile telecommunications base stations will be required to be accompanied by a declaration that the apparatus when operational will meet the guidelines. Similarly where it is intended to place additional antennas onto an existing mast or site, the operator will need to confirm in a declaration to accompany the application that the cumulative exposure will not exceed the ICNIRP guidelines.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/PPS 10 - Telecommunications.pdf