The Republic of China (Taiwan) isn’t a party to the convention that’s why you won’t find the ROC on the membership list or contacts page. The ROC is able to issue import/export certs because they have referred to CITES in their legislation. As per Article X of the Convention
Trade with States not Party to the Convention
Where export or re-export is to, or import is from, a State not a Party to the present Convention, comparable documentation issued by the competent authorities in that State which substantially conforms with the requirements of the present Convention for permits and certificates may be accepted in lieu thereof by any Party.
A number of flow charts can be found on the CITES website which show the structure of the organisation, personnel in the secretariat and their roles.
If you read the text of the convention you will find the following in Article IX:
Management and Scientific Authorities
1. Each Party shall designate for the purposes of the present Convention:
(a) one or more Management Authorities competent to grant permits or certificates on behalf of that Party; and
(b) one or more Scientific Authorities.
2. A State depositing an instrument of ratification, acceptance, approval or accession shall at that time inform the Depositary Government of the name and address of the Management Authority authorized to communicate with other Parties and with the Secretariat.
3. Any changes in the designations or authorizations under the provisions of this Article shall be communicated by the Party concerned to the Secretariat for transmission to all other Parties.
4. Any Management Authority referred to in paragraph 2 of this Article shall, if so requested by the Secretariat or the Management Authority of another Party, communicate to it impression of stamps, seals or other devices used to authenticate permits or certificates.
The Scientific Authorities don’t concern us because we are interested in the people who issue the permits, the management authorities eg.
Thailand
Department of Agriculture
Plant Varieties Protection Division
International Trade of Plants under the Conventions Sub-division
Australia
Wildlife Branch
Department of Sustainability, Environment, Water, Population and Communities
USA
U.S. Fish and Wildlife Service
Division of Management Authority
Japan
Trade and Economic Cooperation Bureau
Ministry of Economy, Trade and Industry (METI)
UK
Department for Environment, Food and Rural Affairs (Defra)
Bio-diversity Programme
I haven’t listed all the management authorities for each country. Some countries will have the management authority role split between a number of government departments eg fauna/flora/fisheries.
Regards, Mick