wowsers said:
Good to hear that someone has such faith in lawyers! After 50 years in practice as a lawyer I read that as if it were music to my ears! A pity that what he was told is wrong.
My sister in-law is an excellent lawyer, so yes I trust her advice

To be fair on her what she said was declarations documents going out of province in Canada should be witnessed/certified by a notary (in other words a lawyer). That last bit was my interpretation...
In Australia (well Victoria at least) the list of people who can witness a statutory declaration is quite extensive (includes occupations such as chartered accountants, police, doctors, engineers and pharmacists) but it was my understanding that they can only witness the declaration if it is being used in Victoria, anything going outside of Victoria especially to another country should meet the requirements of that state/country. I'm not a lawyer, but that seems logical.