Each company shall provide each of its testing stations required herein by subdivisions (a) through (d) of section 229.50 of this Part with suitable equipment, including apparatus, reagents and facilities for testing gas, together with all necessary accessories and appurtenances, as required herein and maintain said equipment in good condition. The contents of each said testing station shall be subject to acceptance by this commission. Access to each said testing station shall be available at all times to the staff of this commission for the purpose of making gas tests and/or inspections of the testing station.