Final answer:
An Employment Pass holder can sponsor a common-law spouse for a Long-Term Visit Pass (LTVP), which is typically valid for 1 year.
Step-by-step explanation:
An Employment Pass holder can bring a common-law spouse to Singapore using a Long-Term Visit Pass (LTVP), which is generally valid for up to 1 year, subject to the discretion of the relevant authorities. The LTVP allows family members of a person who is working in Singapore under an Employment Pass to reside in the country. It is important to note that eligibility criteria for the LTVP include a requirement for the Employment Pass holder to have a minimum fixed monthly salary, and the common-law relationship might need to be substantiated with documentary evidence.