[TYPO3] frontend: remove access restriction for a subbranch?

[Martin Bless]

Part of my page tree is access restricted and belongs to a specific
frontend user group. The top page has the "including subpages"
checked.

Is it possible to remove the access restriction for a special branch
inside the tree of access restricted pages?

In other words: Can I pick a page and declare: This page and below
there shall be no page restriction?

Why I ask? Customers wishes ...

Martin