Organisation isACNCRegistered values are unclear

[nils-work]

Description

The optional isACNCRegistered field of the CommonOrganisation schema is a Boolean type, but the description suggests three meaningful value options:

true if registered with the ACNC. false if not. Absent or null if not confirmed.

While this is a valid pattern according to Empty/Null Fields, specifying this field as an Enum with clearer values will avoid ambiguity.

Intention and Value of Change

Clarify the charity status of an organisation by removing any ambiguity from the negative and absent value options.
This field supports rule Sch.3, 1.3: (I) whether the business is a charitable or not‑for‑profit organisation;

Area Affected

• CommonOrganisation schema > isACNCRegistered field

Change Proposed

Specify the field Type as an Enum with three positive value options:

• REGISTERED
• NOT_REGISTERED
• UNKNOWN

This change could be incorporated with other changes to this schema, such as the removal of 'agent' detail suggested in: ConsumerDataStandardsAustralia/future-plan#90.