this suit was pending, the Legislature amended the second sentence of subsection 102.004(b) to read: However, the court may grant a grandparent or other person deemed by the court to have had substantial past contact with the child leave to intervene in a pending suit filed by a person authorized to do so under this subchapter if there is satisfactory proof to the court that appointment of a parent as a sole managing conservator or both parents as joint managing conservators would significantly impair the child’s physical health or emotional development. Tex. Fam.Code Ann. § 102.004(b) (Vernon Supp.2006) (emphasis added), codifying Act of 2005, 79th Leg., R.S., ch. 916, § 3, 2005 Tex. Gen. Laws 3148, 3149. Thus, since this suit was filed, the Legislature -Texarkana 1996, no pet.) (<HOLDING>). By contrast, the record in this case
holding that court could permit grandparent or other person having substantial past contact with child to intervene in pending sapcr even though original suit requesting possessory conservatorship could not be filed by grandparent or other person and further holding that stepgrandmother had standing to intervene to seek managing conservatorship of child under section 102004b and section 1020039 where natural mother abandoned child after birth parents were divorced natural father remarried father had custody of child after father died child lived first with stepmother then with stepgrandmother and mother first sought custody when child was eleven years old holding that when children had resided with grandparents for several months during pendency of divorce proceedings grandparents had standing to intervene and seek managing conservatorship under former section 102004b and section 1020039 holding that maternal grandmother had standing to intervene in pending sapcr to seek managing conservatorship of child pursuant to former section 102004b and section 102004a where she had substantial past contact with child there was evidence of abuse and neglect of child by mother and mother had been arrested and had subsequently engaged in bizarre and dangerous behavior towards child had attacked grandmother with frying pan and hedge clippers and had been involuntarily committed to psychiatric center all of which established serious and immediate concern for welfare of child holding that the natural father must have established a substantial relationship with the child to merit constitutional protection holding that a child was not barred by a former statute of limitations applicable to actions to establish the existence of a father and child relationship when the current action was to establish the nonexistence of a father and child relationship and the presumed father no longer persisted in maintaining paternity