Notwithstanding use of the conjunctive or disjunctive in a provision of this chapter, before issuance of a permit under this chapter both the owner and operator of a stationary source are responsible for compliance with this chapter and regulations adopted under this chapter. If the owner and operator of the stationary source are separate persons, only one person is required to discharge a specific responsibility. After issuance of a permit under this chapter, only the permittee is responsible for permitted operations. The permittee shall have a designated agent for service of process in the state.