Final answer:
The installation or base commander appoints a primary and alternate fuels responsible officer to manage and safeguard petroleum stocks and maintain proper records.
Step-by-step explanation:
The appointment of a primary and alternate fuels responsible officer for overseeing the care and safeguarding of petroleum stocks and accountable records is a duty typically assigned by the installation commander or base commander. These officers are responsible for ensuring that petroleum products are managed correctly and safely, and that the records pertaining to them are accurately maintained. This is a key role within military or large organizational structures where the proper management of fuel resources is critical for operational readiness and effectiveness.