Meaning
A classification system defined by telecommunications regulators categorizes modifications made to certified radio equipment without requiring a completely new equipment authorization. This categorization, known as a permissive change class, determines the level of testing and documentation needed to maintain compliance. It is divided into several tiers based on whether the change affects the RF parameters, the printed circuit board layout, or the physical housing.
Correctly identifying the class avoids delays in product updates.
Regulatory Limit
Minor changes that do not increase emissions or alter the RF circuitry fall under the simplest regulatory tier. Applying a permissive change class requires the manufacturer to assess the potential impact on electromagnetic compatibility and RF exposure. If the modifications exceed the boundary of the allowed tier, a new grant of authorization must be sought.
Design Variation
Component substitutions and antenna changes often trigger the need for formal reassessment.
Testing Validation
Verification tests are performed to prove that the modified device remains within regulatory limits. Depending on the permissive change class, these tests may range from basic radiated emission scans to a full evaluation of specific absorption rates. The resulting test report is submitted to the certification body to update the existing filing.
