law: 2. Collectors of tolls may compound for tolls leviable under Act 8 of 1851 or this Act.
  Any person  entrusted with the management of the collection of tolls3   under Act 8 of 1851 may in his discretion compound  for any period not exceeding one year with any person for a certain sum to be paid by such person for himself  or for any vehicle or animal kept by him, in lieu of the rates of toll 4  [authorized to be levied under the said  Act 8 of 1851].