Applications for sabbatical leaves shall be submitted to the chief administrative officer as far in advance as possible of the requested effective date of the leave, but in no event later than six months in advance of such date unless such requirement is expressly waived by the chief administrative officer. Each application shall include a statement outlining the program to be followed while on sabbatical leave, indicating any prospective income, stating that the applicant will continue as a member of the professional staff for a minimum of one year upon return, and stating that upon return the applicant will submit to the chief administrative officer a detailed report of professional activities and accomplishments while on sabbatical leave.