A Letter of Consent allows a Dependant's Pass holder to work in Singapore. To be eligible, the applicant must:
be a Dependant of an Employment Pass holder
secure a job offer with a Singapore employer
have a Dependant's Pass that is valid for at least three months.
In order for dependants of S Pass holders to work in Singapore, they should apply for a Work Permit, S Pass or an Employment Pass. Each application would be assessed on its own merits.