18, 1983. The amendment to A.R.S. § 13-604.01 became effective July 27, 1983. The question is whether the amendment merely clarified the legislative intent that the statute only apply to felony probation or whether the original version also applied to misdemeanor probation.
The original version of A.R.S. § 13-604.-01, enacted in 1982, provided for mandatory sentences and severely restricted eligibility for suspension or commutation of sentence, probation, pardon, parole, work furlough, or release from confinement for anyone who committed a felony while on probation, parole, work furlough, or any other release. The original version did not specify whether the prior offense resulting in the probation, parole, work furlough, or other release had to be a felony, or whether it could also apply to misdemeanors and petty offenses. In 1983, the legislature amended the statute to specify that only probation for conviction of a felony offense and only parole, work furlough, or any other release from confinement for conviction of a felony offense would require application of the statute. Sweet’s current offenses, possession of marijuana and cocaine for sale, occurred after the enactment of the original version of the statute but before the amendment. In order to determine whether the original version applied only to prior felony convictions or to all convictions we must look to the principles of statutory construction.
It is clear that a statute will not be applied retroactively unless expressly specified by the legislature. A.R.S. § 1-244. Likewise, A.R.S. § 1-246 provides:
“When the penalty for an offense is prescribed by one law and altered by a subsequent law, the penalty of such second law shall not be inflicted for a breach of the law committed before the second took effect, but the offender shall be punished under the law in force when the offense was committed.”
See also State v. Coconino County Superior Court, 139 Ariz. 422, 678 P.2d 1386 (1984); State ex rel. Corbin v. Pickrell, 136 Ariz. 589, 667 P.2d 1304 (1983); State v. Vineyard, 96 Ariz. 76, 392 P.2d 30 (1964). It is equally clear, however, that “[a]n amendment which, in effect, construes and clarifies a prior statute will be accepted as the legislative declaration of the original act.” City of Mesa v. Killingsworth, 96 Ariz. 290, 297, 394 P.2d 410, 414 (1964). See also B & P Concrete, Inc. v. Turnbow, 114 Ariz. 408, 561 P.2d 329 (App. 1977); Sierra Madre Dev., Inc. v. Via Entrada Townhouses Ass’n, 20 Ariz.App. 550, 514 P.2d 503 (1973); State v. Vondohlen, 24 Ariz.App. 362, 538 P.2d 1163 (1975).
There is a basic and fundamental rule of statutory construction that only where a statute is ambiguous or unclear is a court at liberty to resort to the rules of statutory interpretation, City of Mesa, supra; Sterman v. Transamerica Title Ins. Co., 119 Ariz. 268, 580 P.2d 729 (App.1978); Arizona State Tax Commission v. Lawrence Mfg. Co., 15 Ariz.App. 486, 489 P.2d 860 (1971). The ambiguity question is especially pertinent here in that the usual presumption that an amendment changes rather than clarifies a statute, McCloe v. Utah Home Fire Ins. Co., 121 Ariz. 402, 590 P.2d 941 (App.1978), is only applicable when “the statute amended admitted of no ambiguity prior to amendment.” Arizona Foundation for Neurology and Psychiatry v. Sienerth, 13 Ariz.App. 472, 476, 477 P.2d 758, 762 (1970). Thus, before we can reach the question whether the amendment was merely a clarification of the existing statute or a change in the existing statute, we must ascertain whether the original statute was clear and unambiguous on its face.
An ambiguity in a statute is “not simply that arising from the meaning of particular words, but includes such as may arise in respect to the general scope and meaning of a statute when all its provisions are examined.” 73 Am.Jur.2d, Statutes § 195. An ambiguity may also be found to exist where there is uncertainty as to the meaning of the terms of a statute. State v. Sylva, 61 Hawaii 385, 605 P.2d 496 (1980). The problem in interpreting the statute at issue is not that certain words or