necessary and proper clause

noun, often capitalized N&P&C
nec·es·sary and proper clause

Legal Definition of necessary and proper clause 

: the clause in Article I, Section 8 of the U.S. Constitution that empowers the Congress to make all laws necessary for executing its other powers and those of the federal government as a whole

History and Etymology for necessary and proper clause

from the words of the clause

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not any or not one

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