Your task is to make an argument regarding whether the bubble regulation was a reasonable interpretation of the term "stationary source" in the Clean Air Act. The issue here is what makes an administrative agency's interpretation of terms in an Act the agency is implementing reasonable. Using the structure of IRAC Does the Clean Air Act permit the EPA to define the term "stationary source" to mean whole industrial plants only, which allows plants to build or modify units within plants without the permit required under the Act? Use IRAC Structure.