Ken – In NSW and so far as I’m aware elsewhere, your Owners Corporation (O/C) certainly can decide to self-manage; ours has done that for 6 years. This needs to be done by way of a resolution passed by a majority vote of those Owners present, both in person and by proxy, at a General Meeting (e.g. an AGM); the Executive Committee cannot make that decision.
Be careful about the timing though, as most Agency Agreements that appoint Strata Managers require the O/C to give six (6) months written notice of termination.
That’s period of notice is not such a bad thing, as it gives the O/C time to locate, select, and appoint people to assist it to undertake some functions such as accounting, and time for the current Strata Manager to collate all your Plan’s records in preparation for a hand-over of those to the O/C.
Your O/C could self-manage with the assistance of a business that provides the basic “tools” and some telephone support – I’ve provided links to two of those HERE and HERE.
Your O/C could also contact a company who provides various levels of assistance, such as a basic record keeping, levy collection, and invoice payment style Agreement that leaves day-to-day activities with the E/C. One of those businesses is a sponsor of this Forum and there’s a link to them at the top of this page, or HERE if you wish.
One final word of caution…there is the potential for the roles of your Resident Manager (classified as a Caretaker under NSW Legislation) to overlap with the roles of whoever your O/C chooses to provide support. That’s why your O/C needs to have a formal agreement with its Caretaker, and in NSW that’s outlined in Clauses 40A, 40B, and 40C of the Strata Schemes Management Act (1996).