§ 6. Volunteer firefighters' benefits; general. If a volunteer firefighter dies from the effects of injury in line of duty, or if such a firefighter shall be injured in line of duty, benefits shall be paid and provided pursuant to this chapter, except that there shall be no liability for such benefits when the injury has been solely occasioned by intoxication of the volunteer firefighter while acting in line of duty or by the wilful intention of the volunteer firefighter to bring about the injury or death of himself or herself or another.