The activities authorized by this chapter require collaboration among covered manufacturers. These activities will enable safe and secure collection and disposal of covered drugs in Washington state and are therefore in the best interest of the public. The benefits of collaboration, together with active state supervision, outweigh potential adverse impacts. Therefore, the legislature intends to exempt from state antitrust laws, and provide immunity through the state action doctrine from federal antitrust laws, activities that are undertaken, reviewed, and approved by the department pursuant to this chapter that might otherwise be constrained by such laws. The legislature does not intend and does not authorize any person or entity to engage in activities not provided for by this chapter, and the legislature neither exempts nor provides immunity for such activities.