Nelly, I've been reading through the main section that deals with if a permit is required, and most of it does not apply to jw's because;
Subsection (1)(a) does not apply to a charitable appeal which—
(a) is made in the course of a public meeting; or
(b) is made—
(i) on land within a churchyard or burial ground contiguous or adjacent to a place of public worship, or
(ii) on other land occupied for the purposes of a place of public worship and contiguous or adjacent to it,
This would apply to talks from the platform asking for donations, etc. The only point I can see is in subsection 1b;
“charitable appeal” means an appeal to members of the public to give money or other property (whether for consideration or otherwise) which is made in association with a representation that the whole or any part of its proceeds is to be applied for charitable, benevolent or philanthropic purposes.
The question would be is if mentioning to householders that donations for the worldwide work are accepted is the same as asking for donations. I would say it is just a difference of compliance and obedience, but you would have to ask the body responsible for upholding the law for how they define it.