Subject to dispensation; possible to relax, exempt from, or annul.
Capable of being dispensed; distributable.
Able to be done without; able to be expended; easily replaced.
Not essential to be taken in as part of an organism's diet, as it can be synthesized de novo.
Of, being or relating to a mandate.
Obligatory; required or commanded by authority.
A sign or line that require the path of the disc to be above, below or to one side of it.