Developments in Thailand's post-coup migrant registration

Following the May 2014 coup in Thailand, the new military government cancelled the prior migrant registriation process, and replaced in with the so-called "pink cards".  The following provides some information on new procedures for migrants to move from the "pink cards" to more expansive registration.  But why are migrants in the fisheries sector excluded?

Chaiyaphum province has opened the One Stop Service Center, servicing migrant workers from neighboring countries who are looking for jobs in the area... [the registration services] are available for workers who possess immigrant identification cards issued by the National Council for Peace and Order, and workers from the three countries who have completed the nationality verification process and are holding identification documents, issued by their country of origin, such as passport or other identification papers. The service is however unavailable for workers from Myanmar, Laos, and Cambodia who are employed in the fisheries and seafood processing industry.

"Chaiyaphum opens immigrant workers One Stop Service Center," National News Bureau of Thailand, 30 March 2016.