For the purposes of this chapter, “regulation” means every rule, regulation, order, or standard of general application adopted or amended by the board to implement, interpret, or make specific the law enforced or administered by it, except that the following are not regulations:
(a)
A rule that constitutes the only legally tenable interpretation of existing law.
(b)
A decision that does no more than apply a duly adopted provision of law to a particular set of facts.
(c)
A rule relating only to the internal management of the board that does not in itself significantly affect the rights, privileges, or duties of state agencies, state employees, or other persons.
(d)
A routine, technical, or procedural instruction or criterion that does not in itself significantly affect the rights, privileges, or duties of state agencies, employees, or other persons.