PCT Ltd (PCTL)

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EPA Regulations is the answer. Supplemental Distribution of a Registered Pesticide
According to 40 CFR 152.132, registrants may distribute or sell their registered product under another company’s name and address instead of (or in addition to) their own. Such distribution and sale is termed “supplemental distribution” and the product is referred to as a “supplemental registration” or “distributor product.” The distributor, also known as a “subregistrant,” is considered an agent of the registrant, and both the registrant and the distributor may be held liable for violations pertaining to the distributor product.

Detailed information on the supplemental distribution or supplemental registration of another federally registered product can be found in 40 CFR 152.132.

Important Note: Supplemental registrations are only an extension of a currently federally registered pesticide product. They are a duplication of the basic registered product and must reflect any changes in formulation or labeling made to the basic registered product within the same timeframe imposed on that product.

If the basic registered product is canceled, the supplemental registration is automatically canceled effective on the same date as the basic registered product, and existing stocks must be sold in the same time period (40 CFR 152.132(e)).
If the basic registered product is transferred to another company, supplemental distributorships do not transfer with the section 3 registration. Registrants must notify all supplemental distributors of the transferred product of the transfer agreement.
If the new basic registrant wishes to continue any supplemental distributorship or add new ones, the basic registrant must fill out a new "Notice of Supplemental Distribution of a Registered Product” Form 8570-5.

https://www.epa.gov/pesticide-registration/pesticide-registration-manual-chapter-9-supplemental-distribution-registered