You may refer to the following links https://www.rom.gov.sg/reg_info/rom_solemnisation.asp https://singaporelegaladvice.com/law-articles/civil-marriage-singapore-procedure-register-solemnise/ https://singaporelegaladvice.com/law-articles/can-a-muslim-marry-a-non-muslim-in-singapore/ Do note difference between non-Muslims and Muslims marriage.
after u file, have to wait at least 21days n within 3 months
Can check on ROM site. Should be clearer