Age eligibility in mass tort lawsuits is rarely a single legal cutoff set by a judge. Instead, most thresholds are intake rules written by individual law firms, or administrative criteria set by a federal agency, built around the biological age window where a specific harm is believed to occur. That means the same word — "eligible" — means different things in different cases. A claimant's age might need to fall within a narrow window tied to brain development, gestational weeks at birth, or reproductive-hormone exposure, depending on which mass tort they're asking about.
Table of Contents
- Why Age Rules Differ So Much Between Mass Torts
- When the Litigation Targets Minors
- When Age Thresholds Come From an Agency, Not a Firm
- When "Age" Really Means Gestational Age or Hormone Exposure
- How to Check Your Own Eligibility
Why Age Rules Differ So Much Between Mass Torts
There is no single federal "mass tort age statute." Courts consolidate related lawsuits into a Multidistrict Litigation (MDL) — a procedure that groups similar federal cases before one judge for shared pretrial handling — but the transfer order defining an MDL typically describes the alleged injury mechanism, not a numeric age cutoff. The order consolidating social media addiction cases before Judge Yvonne Gonzalez Rogers in the Northern District of California, for example, frames the litigation around whether platforms caused addictive use and failed to verify users' ages among adolescents, according to the JPML transfer order. Age eligibility rules actually come from two different places. Agencies like the Department of Justice set binding criteria for programs they administer.
Law firms set their own intake criteria to decide which potential clients they'll represent, and those criteria can vary firm to firm even within the same litigation. This distinction matters practically. A DOJ or court-administered eligibility rule is a legal requirement for recovery. A law firm's intake rule is that firm's judgment about which cases are strong enough to pursue — a different firm might take a case the first one declined.
When the Litigation Targets Minors
Social media addiction litigation illustrates the clearest demographic age boundary. More than 3,100 federal cases have been consolidated into the MDL as of early August 2026, according to a docket count reported by Law Street Media.
Intake firms in this litigation generally limit cases to people who were minors during the alleged addictive use, rather than adults. The Social Media Victims Law Center explains that it typically will not take cases for older minors, citing research that the brain's frontal lobe — the region tied to impulse control and decision-making — doesn't finish developing until roughly age 24 to 25, according to Social Media Victims Law Center.
- Eligibility generally requires the claimant to have been a minor when the alleged addictive platform use began.
- The rationale is developmental, not purely chronological: younger brains are considered more susceptible to compulsive-use harms.
- This is a firm-level intake standard, not a rule imposed by the MDL court itself.
When Age Thresholds Come From an Agency, Not a Firm
The Camp Lejeune Justice Act works differently. Congress created a direct path to compensation for people exposed to contaminated water at the North Carolina Marine Corps base, and the Department of Justice administers an "Elective Option" settlement track with fixed, published criteria. Claimants must show they resided or worked at Camp Lejeune for at least 30 cumulative days between August 1, 1953, and December 31, 1987, plus a qualifying injury — and the DOJ's own guidance states no minimum or maximum claimant age, according to DOJ Camp Lejeune guidance.
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That absence of an age floor is deliberate: eligibility extends to children who were exposed before birth. A legal summary of the criteria notes that children born to mothers who drank or used the contaminated water while pregnant on base during the qualifying window can bring their own claims, according to a Price Benowitz summary of CLJA criteria. This is the opposite structure from the social media litigation: instead of a firm narrowing eligibility by age, a federal statute widens it to cover exposure before birth, as long as the residency and injury requirements are met.
When "Age" Really Means Gestational Age or Hormone Exposure
Some litigation uses age-shaped criteria that aren't about the claimant's age at all. In necrotizing enterocolitis (NEC) lawsuits over cow's-milk-based infant formula, firms set intake criteria around gestational age at birth — how many weeks of pregnancy had passed — rather than the infant's age after birth. Cited cutoffs range from under 32 weeks to under 36 or 37 weeks gestation, combined with cow's-milk-based formula exposure in a neonatal intensive care unit before an NEC diagnosis, according to Van Law Firm. Talcum powder ovarian cancer litigation runs on a different axis again: age at diagnosis.
Firms commonly require claimants to have been at least 21 (some set the floor at 22) and generally under 65 at diagnosis, reflecting a litigation theory built around premenopausal genital talc use, according to Morgan & Morgan. Depo-Provera litigation adds a further wrinkle: age functions as a risk factor that strengthens a case rather than a formal cutoff that excludes claimants. The FDA added a meningioma warning to Depo-Provera CI (150 mg) and Depo-SubQ Provera 104 on December 12, 2025, after a BMJ case-control study found roughly 5.6 times higher meningioma odds with a year or more of use, according to HealthDay/MedicineNet. Litigation materials note that risk rises further for women who started injections after age 31 or used them for four or more years, but treat that as evidence of case strength, not a pass/fail eligibility line, according to Drugwatch.
How to Check Your Own Eligibility
Because these rules sit with individual firms or specific agency programs rather than one uniform MDL standard, the only reliable way to check eligibility is to match the specific litigation's own published criteria against the facts of the exposure or injury. A claimant who falls outside one firm's stated age window for a given mass tort may still want to check a second firm's criteria before concluding they have no claim, since these thresholds are set by the firm's own litigation strategy rather than by a court order binding every case in the MDL.
- Identify which program applies: a court-administered MDL, a statutory settlement option like Camp Lejeune's, or a firm's private intake screening.
- Note what kind of "age" the criteria actually measure — chronological age, gestational age at birth, or age at diagnosis — since these are not interchangeable.
- Gather the dates that matter: when exposure occurred, when a diagnosis was made, or when product use began, since several of these criteria are date-of-event specific rather than current-age specific.
- Expect variation between firms within the same litigation; a rejection from one intake screening does not necessarily mean every firm will decline the case.
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