Allows the president to clarify how a law is to be implemented and to define vague terms in the law to guide executive agencies in its implementation

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

answer; in small towns;

answer; sutherland-differential association;

answer; emotional intelligence (ei);