What are the installation requirements for a gas meter?

The correct requirement for the installation of a gas meter centers around ensuring safe and unobstructed access to the gas vent. The choice indicating that the distance from the gas vent to the roof must exceed the overhang ensures that the vent is not obstructed by the building structure, which is crucial for proper ventilation and operation of the gas system. If the vent were too close to the overhang, there could be a risk of gas accumulating and creating hazardous conditions.

In contrast, the other options do not accurately reflect the regulatory requirements or practical safety considerations. Ensuring that gas vents are positioned correctly in relation to building features is vital for both functionality and safety, which is why the distance measure highlighted in the correct answer is critical. The specific restrictions regarding distances from vents help prevent potential issues with gas venting, thus prioritizing safety and compliance with building codes.