Permissable for noise level at Factory and Machine

Regulation 5. Permissible exposure limit.
(1) No employee shall be exposed to noise level exceeding equivalent continuous sound level of 90 dB (A) or exceeding the limits specified in the First Schedule or exceeding the daily noise dose of unity. (2) No employee shall be exposed to noise level exceeding 115 dB (A) at any time.

Reference: FACTORIES AND MACHINERY (NOISE EXPOSURE) REGULATIONS 1989 PART II - PERMISSIBLE EXPOSURE LIMIT