Expands who an employee may take leave to care for under federal leave laws by adding many relatives (domestic partners, in‑laws, grandparents, grandchildren, siblings, nieces/nephews, aunts/uncles) and any person with a family‑like close association. Creates a new limited "parental involvement and family wellness" leave (up to 4 hours per 30-day period, 24 hours per 12-month period) for attending routine family medical appointments, school or community activities for a child or grandchild, and other routine care needs; updates notice, certification, scheduling, and paid-leave substitution rules and applies parallel changes to federal employee leave law.