The audio volume of the system at the equipment of subscriber terminal shall comply with the rules in the following subparagraphs:1. The difference of audio volume between two adjacent program channels shall not exceed 3 (dB) A.2. The difference of audio volume between any two program channel shall not exceed 6 (dB)A.3. The equal advertising volume (Advertising_Leq) in one program shall not exceed 3dB (A) to both equal audio volume of the previous program (Previous_Program_Leq) and equal audio volume of following program (Following_Program_Leq).4. The maxim advertising volume (Advertising_Lmax) in one program shall not exceed more than 3dB (A) to both maximum audio volume of the previous program (Previous_Program_Lmax) and the maximum audio volume of following program (Following_Program_Lmax)In each subparagraph of foregoing paragraph, the “A” in “dB (A)” shall be the Frequency-weighting “A” in CNS 7129