Labor Pension Act Article 37

An employer shall be the proposer of an Annuity Insurance contract, and an employee shall be the insured and the beneficiary. A business entity can only purchase annuity insurance from a single insurer. Qualifications of the insurer shall be jointly prescribed by the Central Competent Authority and the insurance authority.
中文原文 勞工退休金條例第37條
年金保險之契約應由雇主擔任要保人,勞工為被保險人及受益人。
事業單位以向一保險人投保為限。
保險人之資格,由中央主管機關會同該保險業務之主管機關定之。

English translation for reference only; the Chinese text prevails. Not legal advice.