JoeA is correct--no contact until the official first day of practice. Read 4.3 below.
From OHSAA General Sports Regulations:
http://www.ohsaa.org/sports/rglts/GenSportsReg08-09.pdf
4. Instructional Programs (Examples include but are not limited to camps, clinics, workshops,
practices, etc.)
4.1) These regulations apply to individual members of school squads or teams.
4.2) Instructional programs out of the season of the sport involving team play (any activity of individuals with more than one player opposing one player) may be attended only from June 1-July 31. There may be no instructional programs involving team play from August 1 through May 31 except during the season of the sport.
4.3) Individual skill instruction may be received in any sport by a squad member at any time in individual or group lessons. The coach may not conduct individual or group lessons for a squad member except during June 1-July 31 and during the season of the sport.
4.4) There is no limit on the number of players from the same school participating on the same team during the period June 1-July 31.
4.5) Athletes who violate the instructional program regulations may be penalized not to exceed one year of ineligibility for interscholastic athletics.
4.6) Interscholastic coaches in the individual sports of girls gymnastics, boys and girls swimming and diving, boys and girls golf, boys and girls tennis, and boys and girls bowling may coach athletes from the school where employed outside the interscholastic season of the sport.
4.7) Members of the coaching staff are limited to a total of 10 days in any combination of instructional program days and non-interscholastic days as specified in Bylaw 10-3-6.
4.8) Any coach who violates any of the instructional program regulations may be prohibited from involvement for one calendar year in any instructional programs with athletes from the school where employed.
4.9) It is not necessary for instructional programs to be registered, sanctioned or approved by the OHSAA, but schools are responsible for enforcing the regulations.
4.10) Mandatory attendance at instructional programs is not permitted. A coach, paid or unpaid, violates this provision when the coach suggests or in any way implies that a student?s chance to be selected for an interscholastic squad is contingent upon participation in an instructional program.
4.11) Squad members may be used for out-of-season demonstration purposes only if approved in advance by the Commissioner?s office.