Ancestor & Stumped –
Your Executive Committee (E/C) is required to hold Meetings in order to as you say “process its decisions”, and before those are held the Secretary is required to produce a written Agenda and to either distribute that to every Owner a minimum 72 hours in advance of the Meeting or place it on the Owners Corporation’s Notice Board if there is one on-site; that’s the Law and you and every other Owner has the right, either collectively or individually, to enforce the E/C’s compliance with that through formal mediation conducted by the NSW Office of Fair Trading and if necessary through Orders issued by the NSW Consumer Trader and Tenancy Tribunal (CTTT).
With regard to the By-Law (actually a Special By-Law), you need to initially ascertain by enquiries to to NSW Land & Property Information (incorporating the former Land Titles Office) that it’s been properly Registered on the Strata Title, because if it’s not then it’s not legally enforceable.
If it happens that the Special By-Law is Registered, then you and/or any other Owners can seek Orders under Sect 156 of the NSW Strata Schemes Management Act (SCMA) to require the E/C Secretary to supply whatever documents and records you believe have been withheld as a consequence of those not being made available to the Strata Manager.
The CTTT is not powerless to act, they cannot be unwilling, and in fact their sole reason for existence to assist your Owners Corporation (that includes you by the way) to comply absolutely with the provisions of the SCMA.
There’s ample information on this forum to explain the process that you and/or other Owners need to follow, but perhaps post again if you need any more specific advice.