The phrase "authoritative plan" is correct and usable in written English.
It can be used when referring to a plan that is recognized as having authority or is considered definitive in a particular context.
Example: "The committee presented an authoritative plan for the new policy, which was accepted by all members."
Alternatives: "definitive plan" or "official plan".
With an authoritative Obama plan, both Israeli and Palestinian voters would have a new measuring stick.
But over the long term, you can achieve financial independence if you follow an authoritative financial plan.
If you think it's hard to find authoritative literature on tax planning at Amazon.com, imagine also having to sort through Joe Schmoe's self-published thoughts on Uncle Sam's tax code.
No discussion of parental involvement, authoritative parenting, or practice plans occurred.
WeJustGotBack.com was introduced in February, bringing to the market an authoritative voice on family trip planning.
Such broader work would provide a better examined context and more authoritative guidance for individual project planning and development.
Though he went on too long, he was authoritative in demanding that Congress pass his plan quickly and in laying out its benefits for average Americans.
Additional evidence of the absence of a comprehensive counterterrorist strategy and authoritative leadership can be found in "the plan" the D.C.I. described in testimony before the Joint Inquiry: In spring of 1999, we produced a new comprehensive operational plan of attack against [bin Laden] and Al Qaeda inside and outside of Afghanistan.
The politically hued results of such planning and design efforts, whether pursued in authoritative, consultative, or participatory processes, are architectural objects that change, encourage, or reward particular behaviors.
The latest launch from the mighty Y Combinator start-up school, Songkick has ambitious plans to become the central, authoritative home for live music online.
