"operative regulations"; "the major tendencies operative in the American political system"
is similar to
having influence or producing an effect
"many emotional determinants at work"; "an operant conscience"
is similar to
exerting force or influence
"the law is effective immediately"; "a warranty good for two years"; "the law is already in effect (or in force)"
is similar to
being in effect or operation
"de facto apartheid is still operational even in the `new' African nations"- Leslie Marmon Silko; "bus service is in operation during the emergency"; "the company had several operating divisions"
is similar to
serving to permit or facilitate further work or activity
"discussed the working draft of a peace treaty"; "they need working agreements with their neighbor states on interstate projects"