What is the maximum allowable emissions for vehicles in Maryland?

The maximum allowable emissions for vehicles in Maryland indeed varies by vehicle type; this is because different categories of vehicles have distinct emission standards that take into account factors such as the vehicle's size, engine type, and model year. Maryland's emissions regulations are designed to align with federal standards while also addressing the specific environmental needs of the region. Therefore, it is essential for an inspector to consult the state's emissions standards to determine the permissible emissions for a specific vehicle. This ensures that the measurements and regulations are adhered to appropriately, promoting better air quality and compliance with environmental laws.

In contrast, the other options suggest a uniformity that does not reflect the reality of the state's emission regulations. Emissions are not fixed for all vehicle types, as this would not account for the diverse range of vehicles on the road. Similarly, fuel tank capacity and vehicle mileage are not criteria for determining emissions limits; the primary considerations focus on the type of vehicle and its design characteristics.