Wyo. Stat. § 27-15-101 (2026)

(a)   As used in this act:

          (i) "Firefighter" means a paid fireman defined under
W.S. 15-5-201(a)(xi), a firefighter member under W.S.
9-3-402(a)(xxv), an employee under W.S. 15-5-402(a)(viii), a
volunteer fireman defined under W.S. 15-5-201(a)(xiv) and a
volunteer firefighter or firefighter defined under W.S.
35-9-616(a)(x). "Firefighter" also means an individual employed
by a municipal corporation or private organization who devotes
the individual's entire time of employment to the provision of
fire protection service for a city, town, county or fire
protection district;

          (ii)    "Listed disease" means any of the following:

               (A) Cancer, lymphoma or leukemia that may be
caused by exposure to heat, smoke, radiation or a known or
suspected carcinogen as determined by the International Agency
for Research on Cancer;

                 (B)   Cardiovascular disease;

                 (C)   Acute myocardial infarction or stroke;

               (D) A disease, illness, health impairment or
disability determined on a case-by-case basis under
W.S. 27-15-102(h).

          (iii)   "Minimum period of employment" means:

               (A)     Employment as a firefighter for at least ten
(10) years; and

               (B) For volunteer firefighters, an individual is
considered to have been employed for the minimum period of
employment if that individual while actively a volunteer
participates or participated in a minimum of forty percent (40%)
of the drills conducted by the individual's department and a
minimum of twenty-five percent (25%) of the emergency calls
received during the time the volunteer serves or served on call.
Volunteer firefighter departments shall keep individual records
that document the criteria in this subparagraph.

          (iv)   "This act" means W.S. 27-15-101 through
27-15-103.