elec·tive adj
1 a: chosen by popular election
an elective official
b: of or relating to election
c: based on the right or principle of election
the presidency is an elective office
2 a: permitting a choice compare compulsory
b: available as a choice
elective insurance coverage
c: beneficial to the patient but not essential for survival
elective surgery
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.