(1) After 7 years of service as a fully certified professional employee defined as a teacher, nurse, supervisor, director, principal, superintendent, coordinator, psychologist and any other professional position in public education in this State, provided that at least 5 consecutive years of such service shall have been in the employ of the school board from which leave of absence is sought, unless such board in its discretion shall allow a shorter period of time;

(2) For purposes of professional improvement or for the recovery of health after prolonged illness;

(3) The period of leave shall not be shorter than 1/2 school term or longer than 1 full school term;

(4) While on leave the employee shall not be allowed to engage in full-time gainful employment, except by written agreement with the leave-granting board. However, this provision shall not preclude the employee from receiving grants such as scholarships, gifts, fellowships, part-time employment, or other grants of aid as frequently provided by colleges, universities, governmental agencies, corporations, trusts or other individuals to students or other persons engaged in study or travel for purposes of professional improvement;

(5) The professional employee shall agree in writing to return to service to the leave-granting board for a period of at least 1 full school year following the completion of the employee's leave;

(6) Request for sabbatical leave shall be presented in writing to said leave-granting board at a regular meeting of such board before April 1 for leave to begin at the opening of the next term, and before November 1 for leave to begin at the opening of the second semester of the term;

(7) At the end of any such period of leave of absence the employee shall present evidence of that employee's own professional improvement in such terms as shall have been agreed upon between said employee and said leave-granting board at the time when such leave was granted. Such evidence may consist of college transcripts, degrees earned or written reports by the recipient of the leave of absence;

(8) Said leave-granting board shall accept the employee into full-time employment upon that employee's return from leave and assign the employee to the position from which that employee left or to a similar position. In no case may assignment be made so as to invalidate the employee's certification status or to bring about a demotion in position or salary;

(9) For purposes of salary increments and pension eligibility and computation, a year of leave shall be considered a year of experience in covered employment under the provisions of local or state salary and pension programs, except that not more than 2 years of leave shall be applied toward salary increments and pension credits to any person. Failure of an employee to return to service of said leave-granting board shall be cause for forfeiture of salary increments and pension credits for the period of the leave.

(10) School boards may set a limit on the number of employees who may be granted leave each year, provided that, in any district having fewer than 20 professional employees, 1 eligible applicant may be granted leave each year;

(11) The leave-granting district shall provide to the employee granted leave, under paragraphs (1)-(10) of this section, compensation equal to 1/2 the salary to which the employee would have been entitled under full-time employment; provided, however, that in no case shall the compensation paid exceed $10,000 for a full school year leave or $5,000 for a 1/2 school year. The State shall continue to pay the state share of other employment costs as specified in § 6340 of Title 29 for the employee on sabbatical leave.

(12) Sabbatical leave authorized under this section, at state expense, shall be limited to 1 full year leave or 2 half-year leaves per local school district during a fiscal year. Nothing in this section, however, shall prevent a school district from granting additional sabbatical leaves if the district pays the salary and other employment costs for the employee who is on leave.