sentences:  Section 3 of the Act allowed for the voluntary amalgamation of county and county borough forces, while Section 4 gave the Home Secretary the power to make amalgamation schemes of constabularies.Section 16 provided for the "rectification" of the Metropolitan Police District, realigning it with contemporary local government boundaries.Section 18 placed the Isles of Scilly under the Cornwall County Constabulary
  
  
  The Home Secretary's powers under Section 4 of the Act were used on a number of occasions