6.3.2.4. Notwithstanding the limits defined in paragraphs 6.3.2.1., 6.3.2.2. and 6.3.2.3. of this Regulation, if, during the initial step described in paragraph 1.3. of Annex 5, the signal strength measured at the vehicle broadcast radio antenna is less than 20 dB micro-volts over the frequency range 76 to 108 MHz measured with an average detector, then the vehicle shall be deemed to comply with the limits for narrowband emissions and no further testing will be required. a0c0