Blanket disability insurance is hereby declared to be that form of disability insurance covering groups of persons as enumerated in one of the following subdivisions:

(1) Under a policy or contract issued to any common carrier or to any operator, owner, or lessee of a means of transportation, who or which shall be deemed the policyholder, covering a group of persons who may become passengers defined by reference to their travel status on such common carrier or such means of transportation;

(2) Under a policy or contract issued to an employer, who shall be deemed the policyholder, covering any group of employees, dependents, or guests, defined by reference to specified hazards incident to an activity, or activities, or operations of the policyholder;

(3) Under a policy or contract issued to a college, school, or other institution of learning, a school district or districts, or school jurisdictional unit or to the head, principal, or governing board of any such educational unit, who or which shall be deemed the policyholder, covering students, teachers, or employees;

(4) Under a policy or contract issued to any religious, charitable, recreational, educational, or civic organization, or branch thereof, which shall be deemed the policyholder covering any group of members or participants defined by reference to specified hazards incident to an activity, or activities, or operations sponsored or supervised by such policyholder;

(5) Under a policy or contract issued to a sports team, camp or sponsor thereof, which shall be deemed the policyholder, covering members, campers, employees, officials, or supervisors;

(6) Under a policy or contract issued to any volunteer fire department, first aid, civil defense, or other such volunteer organization, which shall be deemed the policyholder, covering any group of members or participants defined by reference to specified hazards incident to an activity, or activities, or operations sponsored or supervised by such policyholder;

(7) Under a policy or contract issued to a newspaper or other publisher, which shall be deemed the policyholder, covering its carriers;

(8) Under a policy or contract issued to an association, including a labor union, which shall have a constitution and bylaws and which has been organized and is maintained in good faith for purposes other than that of obtaining insurance, which shall be deemed the policyholder, covering any group of members or participants defined by reference to specified hazards incident to an activity, or activities, or operations sponsored or supervised by such policyholder; or

(9) Under a policy or contract issued to cover any other risk or class of risks which, in the discretion of the commissioner, may be properly eligible for blanket disability insurance. The discretion of the commissioner may be exercised on an individual risk basis or class of risks, or both.