When the isotopic abundance, mass, concentration, degree of irradiation, degree of moderation, or other pertinent property of fissile material in any package is not known, the licensee shall package the fissile material as if the unknown properties had credible values that would cause the maximum neutron multiplication.
Or. Admin. Code § 333-118-0130
Stat. Auth.: ORS 453.635
Stats. Implemented: ORS 453.605 - 453.807