(a) containers used for the storage, transportation and dispensing of cryogenic liquids are designed for that purpose,

(b) indoor dispensing stations and storage locations for cryogenic liquids are adequately ventilated to prevent the development of harmful atmospheres,

(c) monitoring is performed to ensure the effectiveness of the ventilation of indoor dispensing stations and storage locations for cryogenic liquids and the results are documented, and

(d) signs are posted on indoor dispensing stations and freezers with automatic filling cycles for cryogenic liquids identifying the materials, the hazards and the precautions required.