¶1Owen Hoffman (decedent) died on July 8, 1978. He left a will which has been probated; however, a gift of the residuary estate to his wife has lapsed because she pre-deceased him.
¶2The stipulation reveals the following: As noted, Owen S. Hoffman died on July 8, 1978. He left to survive him neither a spouse, children, nor issue of *613deceased children. He had two siblings, Amy S. Welker and Sidney S. Hoffman. It has previously been noted that Ms. Welker survived decedent. Sidney S. Hoffman, on the other hand, died on October 19, .1953. Sidney’s wife, Mary, survived him, but died in September, 1972. Ruth H. DeLong was born on April 14, 1927, in Pottsville, Schuylkill County, Pa. Her certificate of birth reflects her father’s name as “John Hoffman” and her mother’s name as “Marion Mentch,” and she was named Ruth Sidney Hoffman thereon. Marion Mentch still fives. She was a sister of Mary Hoffman, Sidney’s wife. Shortly after Mrs. DeLong’s birth, the Sidney Hoffmans took custody of her, and she lived with them from that time until her first marriage on March 10, 1946. During that entire period she was known as Ruth H. (Hope) Hoffman.
¶3Under these circumstances, may Mrs. DeLong proceed to hearing, there to present evidence on the issue of her relationship to decedent through her putative father, or does the law of this Commonwealth bar her claim absolutely?
¶4It is first necessary to review the status of the law in this respect over the recent past and at present.
¶5Prior to April 26,1977, there is little question that the statutory law of this Commonwealth controlled. That law provided that an illegitimate child could not inherit from or through his father.
¶6Shortly after Trimble, Pennsylvania legislation came under review in Browning Estate, 5 D. & C. 3d 772, 28 Fiduc. Rep. 1 (1977). The facts were essentially those of Trimble. An alleged illegitimate child claimed an intestate share of his father’s estate. Decedent had in fact been found to be the child’s father in a fornication and bastardy prosecution. Trimble was considered controlling, and section 2107(a) of the PEF Code was declared unconstitutional as to that claimant.
¶7*615Thereafter, on November 26, 1978, the legislature amended section 2107 of the PEF Code by Act 303,
¶8The initial question presented is whether Act 303 has any application to the present case. As will be recalled, Mrs. DeLong’s putative father, Sidney S. Hoffman, died in 1953 — long before the effective date of Act 303. Thus, by the express terms of the act itself, “. . . its provisions [do] not apply. . . .” To rule otherwise would be to impermissibly read into Act 303 a direction that no illegitimate child whose father died before the effective date of the act shall inherit from or through the father.
¶9The case must therefore be governed by prior law — that in existence at the time of the death of the decedent whose estate is now before the court. Owen Hoffman, to repeat, died July 8, 1978, after Trimble and, of course, before November 26, 1978, the date of the above-mentioned amending legislation. At that time, Pennsylvania’s prohibition against inheritance by an illegitimate from or through his father’s estate was still nominally in place, though already declared unconstitutional, at the least, in a situation where the illegitimate had been declared the child of the decedent in a collateral court proceeding held while the father was living. Is the prior legislation similarly unconstitutional in a situation such as we have here? We must revert to Trimble again. Trimble held a total statutory prohibition to be invalid and by its language invited states to “choose a middle ground,” recognizing a valid state interest in regulating both procedure and substantive law in the inheritance field. Until the invitation was accepted by the Pennsylvania legislature, as between a total prohibition and a case by case resolution of claims by illegitimates by or through the father, we must follow Trimble and Browning, and find the former unconstitutional, and the latter permissible.
¶10Counsel for Ms. Welker has strongly urged that Trimble v. Gordon should not be applied retroactively “because it will wreak havoc with decedent’s rights and create unjust claims of paternity.” But application of Trimble to this case does not involve retroactivity. As noted above, the decedent whose estate is now being administered died on July 8, *6171978. In applying Trimble here, then, we are applying the law in effect at that time, not retroactively.
¶11As noted at the outset, we are concerned here only with the question of whether Mrs. DeLong shall be permitted to present evidence in support of her claim as an illegitimate child of decedent’s brother. The claimant must be permitted to present her claim. In so doing, in order to prevail, she will be required to establish proof of her relationship by clear and convincing evidence. That is the present legislative measure of proof required. It is appropriate that the same measure of proof be judicially required in cases originating prior to the effective date of the amending legislation.
¶12Upon the foregoing reasoning, we thus enter the following
¶13DECREE
¶14And now, March 6, 1980, the claim of Ruth H. DeLong to be an heir of decedent is declared cognizable in this court, the merits of such claim to be determined at a hearing to be set.
¶15. While this was initially thought to be an issue in the estate, the parties agree the gift has lapsed.
¶16. Section 7(a), Intestate Act of April 24, 1947, P.L. 80, 20 P.S. §1.7, re-enacted as section 2107(a) of the Probate, Estates and Fiduciaries Code of June 30, 1972, P.L. 508, sec. 2, effective July 1, 1972, 20 Pa.C.S.A. §2107(a) (hereinafter PEF Code).
¶17. Actually, the Illinois statute was less restrictive than Pennsylvania’s. The Illinois statute did not specifically prohibit an illegitimate from inheriting from his father — rather it altered common law by allowing such a child to inherit from and through the mother.
¶18. Act of November 26, 1978, P.L. 1269, sec. 1, 20 Pa.C.S.A. §2107. Hereafter, Act 303.
¶19. If the statute were so interpreted an interesting “equal protection” question would be presented since the effective date section would create two classes of illegitimates subject to differing treatment according to the time certain events occurred.