Telecommunications numbers includes the PSTN code, identification code and subscriber number.
To ensure the interoperability and identification of the telecommunications network and to maintain the operation of the telecommunications services, the agency designated by the Executive Yuan shall draw up the PSTN numbering plan in accordance with the ITU-T (ITU Telecommunication Standardization Sector) protocols, ISO protocols, development trend of international telecommunications numbers and the demand of domestic communications industry.
To use signal point codes or telecommunications numbers set in the PSTN numbering plan as described in the preceding paragraph, telecommunications enterprises shall have said codes and numbers allocated by the competent authority, unless specified otherwise in the Act. In case of making any change, the same rule shall be applied.
When using telecommunications numbers other than those described in the preceding paragraph, telecommunications enterprises shall submit said number to the competent authority according to the method set thereby for its reference. In case of making any change, the same rule shall be applied.
In order to provide emergency rescue services, public affair counseling services, public rescue services or charity services, a government agency (organization), public welfare association, foundation, independent administrative institution or public enterprise may, upon obtaining approval from its superior agencies, supervisory agency or central authority in charge of the industry, apply to the competent authority for being allocated and using special telecommunications numbers.
The establishment and communications fees required to provide the services as described in the preceding paragraph shall be negotiated by the party that has been allocated with special telecommunications numbers and a telecommunications enterprise.

Those who apply to use telecommunications numbers as described in Paragraph 3 of the preceding article shall submit an application, use plan and relevant documents to the competent authority for the allocation thereof.
The classification and numbering of telecommunications numbers; applicants’ qualification and conditions; procedures; documents; matters to be described in the plan; use management and restrictions; adjustments; retrieval; and other related matters shall be promulgated by the competent authority.
The competent authority may charge a telecommunications number use fee to users thereof. The charging standards thereof shall be promulgated by the competent authority.

Where the user of a telecommunications number encounters any of the following circumstances, the competent authority may abolish the allocation of telecommunications numbers in whole or in part:
1. Without justifiable reasons, the user fails to use the number for more than 1 year upon the date of allocation;
2. The user fails to pay the telecommunications number use fees within the prescribed deadline, and the payment remains unpaid upon receipt of the competent authority’s notification;
3. The competent authority has revoked or abolished its registration of the telecommunications enterprise;
4. The competent authority has revoked or abolished the PSTN approval certificate thereof.

The internet address or internet top-level domain name registration management services shall be organized by a corporate organization.
The national IP address registration authority or national code internet top-level domain name registration authority that provides IP addresses or domain name registration management services shall stipulate its operation rules and send them to the competent authority for reference.
Where the top-level domain name is sufficient to represent our country, the registration authority for such domain name shall stipulate the operation rules and send them to the competent authority for reference.
The qualifications and conditions of those who are engaged in services as described in Paragraph 1; the application procedures and methods; the matters to be specified in operation rules; the commissioned registration services; administrative management and other related matters shall be promulgated by the competent authority. Regulations governing related guidance measures shall be promulgated by the organization designated by the Executive Yuan.
To manage IP address or internet domain name registration relevant affairs, the competent authority may cooperate with international organizations for negotiation and cooperation.