RULE 4 of the KSHSAA Handbook: May be what Smokey and Husker were refering to--also agree that swimming may have had a special exception at one time-also some other sports-I remember at one time baseball was considerered an individual sport and the not effected by the "participation" "squad" restriction..

UNITED STATES OLYMPIC COMMITTEE-SPONSORED NATIONAL TRIALS AND COMPETITIONS
Section 1: General Regulations (apply to grades 7-12)
Art. 1: Notwithstanding the other rules of the KSHSAA,

a student may participate as an individual (not representing
his or her school) without loss of interscholastic eligibility:
a. as a member of a National Team (and the actual,
direct tryouts therefore), which is defined as one selected
by the national governing body of the sport on
a national qualification basis either through a defined
selective process or actual tryouts for the purpose of
international competition which requires the entries to
officially represent their respective nations, although it
is not necessary there be team scoring by nation; or

b. in an Olympic Development Program, which is defined
as a training program or competition:
(1) conducted or sponsored by the United States
Olympic Committee (USOC); or
(2) directly funded and conducted by the USOC
member national governing body (NGB) on a
national level (e.g. NGB national championship
competition and the direct qualifications
therefore); or

PROVIDED, HOWEVER, participation as described in
(a) and (b) above is an exception to the other rules of
the KSHSAA only if:
(1) the participation, if during the school year, is approved
by the student’s high school principal,and
the KSHSAA is notified in writing by the principal
at least 30 days prior to the start of the
program; and
(2) the student makes prior arrangement to complete
missed academic lessons, assignments and tests before the last day of classes of the credit grading period in which the student’s absence occurs; and
(3) the student misses no KSHSAA-sponsored postseason
athletic event involving a team in that sport.