For a member of the Teachers' Retirement or the Teachers' Pension System who performs regular job responsibilities during a mandatory assignment that extends beyond the member's 10-month assignment, the standards governing eligibility for earnable compensation are as follows: The local school superintendent or designee shall provide to the teacher written notice of mandatory assignment beyond the 10-month period, but not necessarily mandated for a full 11-month or 12-month period; Regular job responsibilities shall continue through the mandatory assignment beyond the 10 months; Local school systems have flexibility in scheduling the mandatory duty days beyond the 10-month period; and The determination of mandatory assignment for retirement purposes beyond the regular 10-month period is made on a year-to-year basis by the local school superintendent or designee. Compensation for mandatory assignment beyond the 10 months consistent with the standards listed in §A of this regulation shall be reported as earnable compensation. All voluntary extra-pay for extra-duty assignments, including but not limited to summer curriculum development, extracurricular sponsors, additional temporary or occasional assignments, bonuses, and summer school salaries, shall be excluded from the report of earnable compensation. The standards for eligibility for earnable compensation apply to any mandatory assignment as of July 1, 1998.