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HD 4127

An Act to establish the Massachusetts neural data privacy protection act

194th Legislature (2025-2026) Introduced by Simon Cataldo and 1 co-sponsor

Massachusetts establishes first-in-nation privacy rules for neural data collected by brain-computer interfaces and neurotechnology devices.

Senate concurred
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Bill Summary · HD 4127

Legislative bill overview

HD 4127 establishes comprehensive privacy protections for neural data—information generated by brain-computer interfaces and neurotechnology devices. The bill creates regulatory standards and consumer rights regarding the collection, use, and sharing of this biometric information. It represents one of the first state-level attempts to govern an emerging technology category before widespread adoption.

Why is this important

As neurotechnology becomes more commercially viable, the data generated could reveal intimate details about cognition, mental health, and personal preferences with unprecedented precision. Without legal guardrails, companies could exploit this highly sensitive information or share it with third parties. This bill addresses a significant privacy gap by establishing baseline protections before the technology becomes ubiquitous.

Potential points of contention

  • Scope ambiguity: "Neural data" is undefined in available summaries; determining what devices and data streams qualify could determine the bill's practical reach and compliance burden on manufacturers.
  • Innovation versus regulation: Technology companies may argue that prescriptive early regulations could stifle development of beneficial medical and accessibility applications.
  • Enforceability concerns: How Massachusetts would monitor compliance with out-of-state companies and whether penalties align with actual harms remain unclear without the full bill text.

Compiled from official sources — confirm details with the bill’s official record.

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