The director shall designate trained employees of the department to be vested with police powers to enforce and administer the provisions of this chapter and all rules adopted thereunder. The director shall also have authority to contract with other state and local governmental agencies having law enforcement capabilities for services and personnel reasonably necessary to carry out the enforcement provisions of this chapter. In addition, state patrol officers, fish and wildlife officers, fire wardens, deputy fire wardens and forest rangers, sheriffs and marshals and their deputies, and police officers, and those employees of the department of ecology and the parks and recreation commission vested with police powers all shall enforce the provisions of this chapter and all rules adopted thereunder and are hereby empowered to issue citations to and/or arrest without warrant, persons violating any provision of this chapter or any of the rules adopted hereunder. All of the foregoing enforcement officers may serve and execute all warrants, citations, and other process issued by the courts in enforcing the provisions of this chapter and rules adopted hereunder. In addition, mailing by registered mail of such warrant, citation, or other process to his or her last known place of residence shall be deemed as personal service upon the person charged.