(1) In sections 48, 49 and 50, “money bill” means a public bill which, in the opinion of the Speaker, contains only provisions dealing with all or any of the following matters, namely the imposition, repeal, remission, alteration or regulation of taxation; the imposition, for the payment of debt or other financial purposes, of charges on public money, or the variation or repeal of any such charges; the grant of money to the Crown or to any authority or person, or the variation or revocation of any such grant; the appropriation, receipt, custody, investment, issue or audit of accounts of public money; the raising or guarantee of any loan or the repayment thereof, or the establishment, alteration, administration or abolition of any sinking fund provided in connection with any such loan; or subordinate matters incidental to any of the matters aforesaid; and in this subsection the expressions “taxation”, “debt”, “public money” and “loan” do not include any taxation imposed, debt incurred or money provided or loan raised by any local authority or body for local purposes.