"requirement" - key terms from Wikipedia

additional margin requirement
capital requirement
chinese requirement
exceptions to the warrant requirement
fuel requirement	premium unleaded gasoline
initial meld requirement
legal requirement
maintenance margin requirement
maintenance requirement
margin requirement
minimum margin requirement
morse code requirement
operational requirement
passport requirement
product requirement
quantitative material requirement
reasonableness requirement
referenced requirement
requirement
requirement	analysis
requirement	for spell checking
requirement	specifications
reserve requirement
room of requirement
wagering requirement
work experience requirement