Certain individuals not treated as active participants
For purposes of this subsection, any individual described in any of the following subparagraphs shall not be treated as an active participant for any taxable year solely because of any participation so described:
(A) Members of reserve components Participation in a plan described in subparagraph (A)(iii) of paragraph (5) by reason of service as a member of a reserve component of the Armed Forces (as defined in section 10101 of title 10 ), unless such individual has served in excess of 90 days on active duty (other than active duty for training) during the year.
(B) Volunteer firefighters A volunteer firefighter— (i) who is a participant in a plan described in subparagraph (A)(iii) of paragraph (5) based on his activity as a volunteer firefighter, and (ii) whose accrued benefit as of the beginning of the taxable year is not more than an annual benefit of $1,800 (when expressed as a single life annuity commencing at age 65).