Metro construction required billions of federal dollars, originally provided by Congress under the authority of the National Capital Transportation Act of 1969. The cost was paid with 67% federal money and 33% local money. This act was amended on January 3, 1980 by the National Capital Transportation Amendment of 1979 (also known as the Stark-Harris Act), which authorized additional funding of $1.7 billion to permit the completion of of the system as provided under the terms of a full funding grant agreement executed with WMATA in July 1986, which required 20% to be paid from local funds. On November 15, 1990, the National Capital Transportation Amendments of 1990 authorized an additional $1.3 billion in federal funds for construction of the remaining of the system, completed via the execution of full funding grant agreements, with a 63% federal/37% local matching ratio.