Minutes don't have to be put up on noticeboards as logistically, the noticeboards would have to be huge (we have 6 meetings a month with all the various committees). But they do have to be available to the public under the Freedom of Information publication scheme. So members of the public have the right to view them or request them once they have been approved at the next meeting. It is also appropriate to send a copy of the minutes to the local library for their reference section.
It is good practice to publish them on the Parish Council website and indeed, in order to obtain a Local Council Award, they have to be there in perpetuity.
There is no acceptable reason as to why minutes should not be made available but there is no statutory guidance as to what is required (except FOI legislation). What does your parish council do?