Washington Revised Code Title 48. Insurance § 48.84.040. Policies and contracts--Prohibited provisions

(1) Use riders, waivers, endorsements, or any similar method to limit or reduce coverage or benefits;

(2) Indemnify against losses resulting from sickness on a different basis than losses resulting from accidents;

(3) Be canceled, nonrenewed, or segregated at the time of rerating solely on the grounds of the age or the deterioration of the mental or physical health of the covered person;

(4) Exclude or limit coverage for preexisting conditions for a period of more than one year prior to the effective date of the policy or contract or more than six months after the effective date of the policy or contract;

(5) Differentiate benefit amounts on the basis of the type or level of nursing home care provided;

(6) Contain a provision establishing any new waiting period in the event an existing policy or contract is converted to a new or other form within the same company.