OPINION
The issue in this appeal is whether Pennsylvania’s four-year statute of limitations applicable to an action upon a judgment operated as a bar to registration and enforcement of a foreign support order under the Revised Uniform Reciprocal Enforcement of Support Act. We find that it did not and therefore reverse the order of the Superior Court.
*83 In 1985, Linda Morrissey and Kirk Morrissey were divorced by a final decree entered in the Court of Common Pleas of Grayson County, Texas. In the decree, the Texas court directed Mr. Morrissey to pay $200.00 per month for the support of the parties’ two minor children, until the first child reached the age of eighteen (the “Texas support order”). 1 Mr. Morrissey subsequently moved to Lebanon County, Pennsylvania.
In April, 1995, Mrs. Morrissey registered the Texas support order in the Court of Common Pleas of Lebanon County, pursuant to Section 4539 of the Revised Uniform Reciprocal Enforcement of Support Act (“RURESA”). 2 By doing so, she sought to initiate collection of approximately $22,000 in arrearages, which she alleged had accrued under the Texas support order over the past ten years. Mr. Morrissey filed timely exceptions, asserting that registration was barred, at least in part, by the statute of limitations applicable to actions upon judgments, 42 Pa.C.S. § 5525(5), by the statute of limitations applicable to foreign claims, 42 Pa.C.S. § 5521(b), and by the equitable doctrine of laches.
The Lebanon County court conducted a hearing on the exceptions and determined that registration of the Texas support order was not time barred, while reserving decision on other issues, including Mr. Morrissey’s challenge to the amount of the arrearages owing. On appeal, the Superior Court reversed, holding that the four-year statute of limitations pertaining to an action upon a judgment, 42 Pa.C.S. § 5525(5), applied.
See Morrissey v. Morrissey,
*84 RURESA and its predecessor, the Uniform Reciprocal Enforcement of Support Act (“URESA”), were initially developed by the Conference of Commissioners of Uniform Laws to provide a means by which to compel parents who crossed state lines to fulfill their legal duty to support their children. See generally Hon. Mark S. Coven, Welfare Reform, Contempt and Child Support Enforcement, 30 Suffolk U.L.Rev. 1067, 1078-79 (Winter 1997). Ultimately, some form of RURESA or URESA was enacted by all fifty states. 3 Id.
RURESA’s express purpose of improving and extending by reciprocal legislation the enforcement of duties of support, see 23 Pa.C.S. § 4501(b) (repealed), was served by requiring Pennsylvania courts to afford foreign support orders the same effect as domestic support orders. Thus, under RURESA, a properly registered foreign support order:
shall be treated in the same manner as a support order issued by a court of this Commonwealth. It has the same effect and is subject to the same procedures, defenses and proceedings for reopening, vacating or staying as a support order of this Commonwealth and may be enforced and satisfied in like manner.
23 Pa.C.S. § 4540(a) (repealed).
Domestic support orders that require periodic payments are treated as judgments that vest when each separate installment becomes due, but remains unpaid. See 23 Pa.C.S. § 4352(d); see also Pa.R.C.P. No.l910.23-l(a). After each judgment obtains, statutes of limitations such as would constrain the underlying cause of action no longer apply; the only limitations periods that affect collection are those applicable to enforcement efforts. For example, a twenty-year statute lim *85 its executions against personal property. See 42 Pa.C.S. § 5529. 4
In this case, the Superior Court properly treated the arrearages under the Texas support order as periodic judgments in the manner of domestic arrearages. Its decision, however, to limit the enforceability of the order to the four-year period preceding registration resulted in substantially less favorable treatment than would be afforded to a domestic support order.
Under Pennsylvania law, foreign judgments are treated, in the first instance, not as judgments, but as rights of action. Historically, obligees were required to commence a civil action on the existing foreign judgment, consummating in a Pennsylvania judgment, before enforcement could be had in the Commonwealth.
5
See, e.g., Engineers Nat’l Bank v. Drew,
*86 However, in enacting the various statutes providing for registration of foreign judgments, 7 the legislature implemented streamlined procedures for domesticating foreign judgments, establishing registration as an alternative to the commencement of a civil action. In the case of RURESA, a foreign support order became immediately enforceable in Pennsylvania upon its registration. See 23 Pa.C.S. § 4540(a) (repealed). Such registration did not require the commencement of an action, an adjudication of rights, the consummation of a new judgment or the entry of any other order of court. Rather, registration became effective merely by making a required filing, 8 and court involvement became necessary only upon the filing by the obligor of a petition to reopen, vacate or stay the registration, 23 Pa.C.S. § 4540(a), (b) (repealed), and to the extent necessary to the enforcement of the registered support order. 9
*87 Thus, RURESA eliminated, the need to commence a separate civil action as the vehicle to achieve domestic enforcement of foreign support orders, and the four-year statute of limitations applicable to actions on judgments, by its terms, did not apply to registration under the act. 10
In its opinion in this case, the Superior Court acknowledged the elimination of the requirement of a civil action upon a foreign support order to achieve domestic enforcement and recognized the legislative directive to afford to such orders the same effect as accorded to domestic support orders. It found, however, that the “procedures” portion of the registration provision, 23 Pa.C.S. § 4540(c) (repealed), incorporated the four-year statute into RURESA, and that the reasoning of an earlier decision,
National Union Fire Ins. of Pittsburgh, Pa. v. Nicholas,
In Nicholas, the Superior Court determined that the four-year statute applied to registration and enforcement proceedings under UEFJA. The court properly recognized that, by *88 providing the registration procedure under UEFJA, the legislature intended to benefit obligees under foreign judgments by eliminating burdensome procedural requirements associated with a civil action on a judgment. Nevertheless, it concluded that:
[hjowever essentially dissimilar the two procedures for domesticating the foreign judgment, the effect of the judgments obtained is identical. Thus, there would appear to be no logical basis upon which to impose two different periods of limitations.
Nicholas,
The difficulty with this conclusion is that there are, in fact, logical and legitimate reasons for adopting a uniform law providing for reciprocal enforcement of judgments (and, in the case of RURESA, support orders) which does not implicate the four-year statute applicable to civil actions brought for the same purpose. In addition to the improvement and extension of reciprocal enforcement, and in light of the fact that the registration statutes are non-exclusive, the limited applicability of the four-year statute also encourages use of the streamlined registration procedure over the more cumbersome civil action.
See generally Nobel Well,
More important, application of the four-year statute simply is not required by the terms of UEFJA.
11
See
42 Pa.C.S. § 4306. Statutes of limitations affecting personal actions are procedural in nature,
see, e.g., Goldstein v. Stadler,
In this case, the Superior Court also relied upon Section 4540(c) of RURESA to support its conclusion that the Texas support order was subject to a four-year limitation. Section 4540(c) provided that, at the hearing to enforce a registered support order, the obligor could present only matters that would be available to him as defenses in an action to enforce a foreign money judgment. 23 Pa.C.S. § 4540(c) (repealed). The Superior Court found that such defenses included the four-year statute.
See Morrissey,
Subsections (a) and (c), however, address separate aspects of the registration and enforcement process. Subsection (a) relates to the registration aspect, according foreign support orders, immediately upon registration, the same status as
*90
domestic support orders for purposes of subsequent enforcement. 23 Pa.C.S. § 4540(a) (repealed). The obligor’s remedy to contest registration is to challenge the order by petition to reopen, vacate or stay the order. 23 Pa.C.S. § 4540 (a), (b) (repealed). As the Superior Court acknowledged, the four-year statute clearly does not apply when considering Section 4540(a), because the limitation does not operate as a bar to domestic support orders.
See Morrissey,
Subsection (c), on the other hand, is not directed to registration or to the effect of the registered order. To the contrary, it is expressly directed to subsequent enforcement, establishing the procedure for the hearing to enforce the registered support order. An action upon a judgment, to which the four-year statute would apply, is not the equivalent of an enforcement proceeding. 13 By eliminating the necessity of an action upon a judgment as a prerequisite to reciprocal enforcement of a foreign support order and providing the ministerial act of registration as an alternative, the legislature advanced the obligee to the enforcement stage, at which point the four-year statute has no relevance. Section 4540(c), then, implicated only those periods of limitation applicable to enforcement proceedings. 14
*91 We conclude, therefore, that the four-year statute applicable to actions upon judgments does not bar registration and enforcement of the Texas support order pursuant to RURESA. This interpretation comports with the legislature’s intent to maintain substantially equal access to the means to enforce support obligations as between children residing in Pennsylvania and children residing in other states. 15
*92 Accordingly, the order of the Superior Court is reversed and the case is remanded to the Court of Common Pleas of Lebanon County for further proceedings consistent with this Opinion.
Notes
. Thereafter the decree required Mr. Morrissey to pay $100.00 per month for the support of the remaining minor child. At the time of the decree, the children were one and three years of age.
. Act of October 30, 1985, P.L. 264, No. 66, 23 Pa.C.S. §§ 4501-4540 (repealed).
. RURESA was repealed and replaced in 1996 by a successor statute known as the Uniform Interstate Family Support Act, Act of April 4, 1996, P.L. 58, No. 20 § 6 (current version at 23 Pa.C.S'. §§ 7101-7802) ("UIFSA”), also derived from a uniform law. All of the uniform statutes governing interstate reciprocity in enforcing support orders were reposed within the Domestic Relations Code at Title 23 of Pennsylvania Consolidated Statutes.
. Pursuant to the Domestic Relations Code, a support order is enforced primarily by means of execution. 23 Pa.C.S. § 4352(d). Notably, the Code also provides for various supplemental remedies in aid of such execution, for example, attachment of income. See, e.g., 23 Pa.C.S. § 4348.
. The cause was originally asserted as an action in debt or assumpsit.
See Merchants’ Ins. Co. v. De Wolf,
. Section 5525(5) of the Judicial Code provides that:
*86 The following actions and proceedings must be commenced within four years:
(5) An action upon a judgment or decree of any court of the United States or of any state.
42 Pa.C.S. § 5525(5). The term "action” itself is defined in the Judicial Code as "[ajny action at law or equity.” 42 Pa.C.S. § 102. Under the Pennsylvania Rules of Civil Procedure, a civil action is commenced by the filing of a writ of summons or a complaint. Pa.R.C.P. No. 1007.
. Such statutes include RURESA, its predecessor URESA, RURESA's successor UIFSA, and the more generally applicable Uniform Enforcement of Foreign Judgments Act ("UEFJA”), Act of July 9, 1976, P.L. 586, No. 142 § 2 (current version at 42 Pa.C.S. § 4306). UEFJA establishes a procedure for registration of foreign judgments, which is substantially similar to the procedure formerly available under RURESA for registration of foreign support orders only. Indeed, UEFJA offers an alternative means for registration of arrearages due under a foreign support order.
. To achieve proper registration, an obligee under a foreign support order was required to file: a certified copy of the foreign support order (with all modifications), a copy of the reciprocal enforcement of support law of the state in which the support order was entered, and a verified statement signed by the obligee. See 23 Pa.C.S. § 4539 (repealed).
. RURESA also permitted the obligee, alternatively, to file a petition seeking enforcement of the support order in the state of the obligee's residence, which was then required to forward the claim to the state in which enforcement was sought. See 23 Pa.C.S. §§ 4511-4526 (repealed). Such procedure is not relevant here.
. A number of courts from other jurisdictions have reached the same conclusion when considering the applicability of similar statutes of limitations to registration under RURESA, URESA and UEFJA.
See State ex rel. Inman v. Dean,
. Notably, UEFJA does not contain language similar to the provision of Section 4540 of RURESA, relied upon by the Superior Court in this case in reaching its conclusion that RURESA expressly incorporates the four-year statute.
. States are free to apply their own statutes of limitations to close their doors to judgments rendered in other states to the extent that the statute is reasonable and is applied in a non-discriminatory fashion.
M’Elmoyle for the use of Bailey v. Cohen,
. The fundamental distinction between actions upon judgments and enforcement proceedings is recognized in a majority of jurisdictions.
See Dean,
.
See supra
note 10 (citing
Dean,
A contrary interpretation of Section 4540(c) would result in greater restriction upon registration of support orders than imposed upon registration of foreign judgments generally under UEFJA, which by its terms clearly does not implicate the four-year statute.
. We note that both UIFSA, RURESA’s successor statute, and legislation recently enacted by the United States Congress,
see
Full Faith and Credit for Child Support Order Act ("FFCCSOA”), Pub.L. No. 103-383, § 3(a), October 22, 1994, 108 Stat. 4064 (revised version at 28 U.S.C. § 1738B), would compel the same result. Both of these statutes require reciprocal enforcement of child support orders and provide that the controlling period of limitation is the
longer
of applicable domestic and foreign statutes of limitations. 28 U.S.C. § 1738B(h)(3); 23 Pa. C.S. § 7604. Apparently, Texas law is generous to the enforcement of domestic and foreign support orders and would not bar Mrs. Morrissey’s claims.
See, e.g., In re Kuykendall,
Several jurisdictions have concluded that UIFSA and FFCCSOA should be retroactively applied.
See, e.g., Welsher v. Rager,
