25 Pa. Code § 217.153
An application for a specific license authorizing the incorporation of NARM into gas and aerosol detectors to be distributed to persons exempt under Subchapter B (relating to general provisions for radioactive material) will be approved if the application satisfies requirements equivalent to those in 10 CFR 32.26—32.29. The maximum quantity of radium-226 may not exceed 0.1 microcuries (3.7 kBq).