Plenary.  Full, entire, complete, absolute, perfect, unqualified.  Mashunkashney v. Mashunkashney, 191 Okl. 501, 134 P.2d 976, 979.

Madden v. Commonwealth of Kentucky, 309 U.S. 83 (1940):

"In the states, there reposes the sovereignty to manage their own affairs except only as the requirements of the Constitution otherwise provide. Within these constitutional limits the power of the state over taxation is plenary."

Lyeth v. Hoey, 305 US 188, 59 S. Ct 155 (1938):

"In dealing with the meaning and application of an act of Congress enacted in the exercise of its plenary power under the Constitution to tax income and to grant exemptions from that tax, it is the will of Congress which controls, and the expression of its will, in the absence of language evidencing a different purpose, should be interpreted 'so as to give a uniform application to a nation-wide scheme of taxation'. Burnet v. Harmel, 287 U.S. 103, 110 , 53 S.Ct. 74, 77. Congress establishes its own criteria and the state law may control only when the federal taxing act by express language or necessary implication makes its operation dependent upon state law. Burnet v. Harmel, supra. See Burk-Waggoner Oil Association v. Hopkins, 269 U.S. 110, 111 , 114 S., 46 S.Ct. 48, 49; Weiss v. Wiener, 279 U.S. 333 , 49 S.Ct. 337; Morrissey v. Commissioner, 296 U.S. 344, 356 , 56 S.Ct. 289, 294. Compare Crooks v. Harrelson, 282 U.S. 55, 59 , 51 S.Ct. 49, 50; Poe v. Seaborn, 282 U.S. 101, 109 , 110 S., 51 S.Ct. 58; Blair v. Commissioner, 300 U.S. 5, 9 , 10 S., 57 S.Ct. 330, 331."

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