Enquiry Officer discretion expanded to allow documented time extensions and require enquiry report disclosure with show cause notices. Amendments formalise Enquiry Officer discretion to extend time limits for sufficient reasons recorded in writing, clarify that contraventions include specified regulations as amended, make certain submissions permissive rather than mandatory, require enclosure of the enquiry officer's report with show cause notices, convert some mandatory reply obligations into permissive ones, and direct the Chairman or Member to consider replies (including oral submissions) and pass orders expeditiously within an endeavour timeframe.