Trust formalities require written and registered instrument for immovable property or transfer of ownership for movable property. Trusts of immovable property require a non-testamentary written instrument signed by the author or trustee and registration, or creation by will; trusts of movable property require the same formal declaration or transfer of ownership to the trustee. The statutory formalities govern validity, transfer and evidence, but do not apply where enforcing them would effectuate a fraud.