The antenna of an OBS may not violate the regulations concerning building and obstacle height restriction in the perimeters of airports, airfields, navigation aids and related facilities promulgated by the Ministry of Interior, the Ministry of National Defense, and the Ministry of Transportation and Communications.
The height of an antenna structure exceeding 60 meters above ground shall be painted with aviation color marks and equipped with marker beacons, and shall maintain a safety clearance from high voltage lines for public safety.

The height and direction of an OBS antenna shall be limited according to the maximum RF output power from its transmitter; it shall be ensured that no legitimate buildings higher than the antenna within the following distances from the front direction of the antenna:
1.For those base stations transmitting more than 7.94 Watts: 15 meters.
2.For micro cell base stations (1.26 ~ 7.94 Watts): 8 meters.
Base stations whose antenna input RF power is more than 2W must not be installed with antennas designed for the coverage of outdoor radio waves inside a building.

The radio frequency equipment of a base station provided by a winning bidder or service provider shall require a model certificate from the NCC prior to installation application.

Bid winners or operators shall establish the backup power supply of base stations with voice capacity complying with the following regulations:
1.The power supply capacity for spatial iron tower base stations shall last more than 4 hours; an exception may be permitted by special approval by the competent authorities due to the limitations caused by technical details, space or other factors.
2.The backup power supply capacity for the base stations installed on buildings in remote areas shall last more than 2 hours; an exception may be permitted should the weight of backup power supply equipment can affect structural integrity of the building, which shall be verified by relevant professionals with credential documents.
3.The base stations assigned by the competent authorities to be functioned with disaster relief shall be equipped with the capacity of backup power supply lasting for more than 72 hours; an exception may be permitted by the competent authorities due to the limitations caused by technical details, space or other factors.
The relevant expenditures for the installation of the backup power supply equipment of base stations in the above regulation 3 Can, in accordance with regulations, be aided with subsidies of the competent authorities.
The iron towers of the spatial iron tower base stations shall resist the scale of wind force factor above 15.
Bid winners or operators shall retain the credential documents of identification issued by relevant professional technicians for auditing.
Operators shall submit the records of the annual self-inspection conducted on backup power supply capacity and the resistance against wind force scales to the competent authorities for reference.

Should the backup power supply capacity or wind resistance of existing iron towers of base stations not comply with the regulations in Item 1 and Item 3 of Article 15.1, or no credential documents relevant to the identification of structure and fireproof safety issued by relevant professional technicians are received by authorities, unless the base station falls into the category of being exempt from installation permits, operators shall submit improvement plans to the competent authorities for reference within 3 months after this measure was amended on August 17, 2017.

The NCC may conduct scheduled or non-scheduled inspection of base station equipment of a winning bidder or service provider.

The winning bidder or the service provider shall at least complete the co-antenna base stations and reach the following percentages of the total amount of constructed base stations from the starting date:
1.5% of the total amount of base stations constructed within 1 year.
2.10% of the total amount of base stations constructed within 2 years.
3.12% of the total amount of base stations constructed within 3 years.
4.14% of the total amount of base stations constructed within 4 years.
5.16% of the total amount of base stations constructed within 5 years.
6.18% of the total amount of base stations constructed within 6 years.
7.20% of the total amount of base stations constructed within 7 years.
If the base stations can not be built in co-antenna with other business provider due to antenna problems, the service provider shall have the proportion of their co-site base stations over the total amount of constructed base stations reach the percentage of 10% within 1 year, 20% within 2 years, from the date acquiring the business license.
The winning bidder or the service provider shall install a base station by co-antenna or co-site way when it is installed on a public building or land of a governmental agency or organization.
A base station with maximum RF output power from its transmitter not exceeding 7.94 Watts can be optionally excluded from the calculation of co-antenna ratios.
The days to start calculating co-antenna ratios in Paragraph 1 are as follows:
1.The day for the Mobile Communications business is January 1, 2003, but only for the new installed base stations.
2.The day for the Third Generation Mobile Communications business is January 1, 2007.
3.The day for the Mobile Broadband Business:
(1) For licenses issued in 2013: Jan 1st, 2016.
(2) For licenses issued in 2015: Jan 1st, 2018.
(3) For licenses issued in 2017: Jan 1st, 2020.