(1) An employee who is participating in a temporary assignment shall be considered as being on detail to a regular work assignment of the sending agency or in a status of leave of absence from the sending agency.

  (2) An employee who is on detail shall receive at least the same salary and benefits to which he would otherwise be entitled and which shall be paid by the sending agency except as otherwise agreed between the sending and the receiving agencies. A receiving agency shall supervise the duties of an employee who is on detail except as otherwise agreed to by the sending and receiving agencies.

  (3) An employee who is on a status of leave of absence shall receive at least the same salary and benefits to which he would otherwise be entitled and which shall be paid by the receiving agency except as otherwise agreed between the sending and the receiving agencies. An employee who is on a status of leave of absence may be granted annual leave or other time off with compensation to the extent authorized by law applicable to the sending agency. Except as otherwise provided in this act, an employee who is in a status of leave of absence has the same rights, benefits, and obligations as other employees of the sending agency who are on a leave of absence status for any other purpose. Notwithstanding any other law an employee may credit the period of the assignment toward any retirement benefit of the sending agency.