A professional engineer shall practice the profession in any of the following manners:
1. Establishing an engineering office organized as a sole proprietorship or partnership.
2. Establish a professional engineering consulting firm or be hired by one.
3. Hired by a profit-seeking enterprise or entity, other than those mentioned in the preceding Subparagraph, which is required by law to hire a licensed professional engineer.
A professional engineer shall practice only in one single firm.　A professional engineer holding professional engineer certificates of different branches may engage in different branches of professional practices in one single firm.

A professional engineer, though possessing the professional engineer certificate, shall not practice the profession until having gained at least two years of engineering experience and until obtaining the professional engineer license from the central competent authority.
The preceding Paragraph regarding engineering experience is not applicable to professional engineers who qualify through a full or partial examination exemption.
The application of professional engineer license of the first paragraph shall be reviewed and registered by the central competent authority before the issuance of the license. The central competent authority shall notify the association of professional engineers when issuing engineering licenses.
The professional engineer license is valid for six years. The professional engineer as the holder of a professional engineer license shall apply, three months prior to the date of expiration of the license, with verified documents of professional practice and training certificates approved by the central competent authority for renewal of the professional engineer license.
The central competent authority may entrust non-government organizations for conducting renewal matters of professional engineer licenses, approval of verified documents of professional practice and training certificates.
The regulations for the qualifications, terms and conditions, procedures of application, required documents and other matters to be complied with for renewal of the licenses as set forth in Paragraph 4 shall be prescribed by the central competent authority.
Professional engineers of all engineering branches having possessed professional engineer licenses prior to enforcement of the amendment of this Act on May 31, 2011 shall be subject to Paragraph 2 and Paragraph 4 beginning the date when the amended clause of this Act takes effect.

The professional engineer license shall register the following particulars:
1. Name, gender, serial number of identification document.
2. Date of birth.
3. Way of professional practice.
4. Name and location of the business entity where the professional engineer practices.
5. Professional engineering branches, file number of professional engineer certificate and scope of professional services.
6. Date of issuance and file number.
The professional engineer shall apply for renewal license within fifteen days commencing from the day of the occurrence of the fact if any change happens within preceding Paragraph prescribed.

The central competent authority shall establish professional engineer database to register the following particulars:
1. Name, gender, address, serial number of identification document.
2. Date of birth.
3. Way of professional practice
4. Name and location of the business entity where the professional engineer practices.
5. Engineering branch(s) of the professional engineer.
6. File number of professional engineer certificate
7. File number, date of issuance and effective period of the professional engineer license.
8. Categories and facts of awards or punishment received.
9. Change in the registered particulars.
10. Dates to start up, suspend and resume the professional practice.
For the purpose of improving the public interests, the central competent authority may publish the matters set forth in the preceding Paragraph on the website, except the address and serial number of identification document in Subparagraph 1and matters in Subparagraph 2.

One shall not be qualified for a professional engineer license, and the license of a professional engineer shall be revoked or abolished under any of the following circumstances:
1. Have the professional engineer certificate revoked or abolished pursuant to Article 6.
2. Have been declared a guardianship or assistantship has not been revoked.
3. Have been declared bankrupt and have not regained the legal rights.
4. Have been certified by two or more medical physicians of the appropriate specialty commissioned by the Central competent authority to be suffering from mental illness or other physical or mental impairment that prevents him/her from engaging in professional practice.
5. Being suspended from the professional practice of this Act as a penalty according to other laws and regulations.
6. Disciplinary action through abolishment of the professional engineer certificate according to this Act.
Where one forfeits or is revoked or abolished of professional engineer license under preceding Subparagraphs 2~5, he/she may reapply for professional engineer license according to this Act as long as the cause ceases to exist.

A professional engineer who voluntarily suspends professional practice shall apply to the central competent authority for revocation of his/her professional engineer license within thirty days commencing from the day of suspension from professional practice.