As used in this chapter, unless the context otherwise requires:
(a)
“Designation” means a designation made pursuant to Section 6321.
(b)
“Instrument” includes all of the following:
(1)
An insurance, annuity, or endowment contract (including any agreement issued or entered into by the insurer in connection therewith, supplemental thereto, or in settlement thereof).
(2)
A pension, retirement benefit, death benefit, stock bonus, profit-sharing or employees’ saving plan, employee benefit plan, or contract created or entered into by an employer for the benefit of some or all of his or her employees.
(3)
A self-employed retirement plan, or an individual retirement annuity or account, established or held pursuant to the Internal Revenue Code.
(4)
A multiple-party account, as defined in Section 5132.
(5)
Any other written instrument of a type described in Section 5000.