Every fire department relief association may allow to its members benefits for the following causes, as provided by law:
(1) a service pension to a member who, by reason of service, has become entitled to a service pension;
(2) to a member who has become maimed or disabled for life in line of duty;
(3) to a member who has suffered injury in line of duty;
(4) to a member who has contracted sickness in line of duty;
(5) funeral expenses of a member;
(6) pensions to the surviving spouse, orphan, or orphans of a deceased member.