Contracts Act (Cap. 53): Primary legislation governing contract formation, validity, and enforcement in Singapore. Essential for basic promissory note structure and enforceability.

Securities and Futures Act (Cap. 289): Regulates securities and financial instruments. Relevant for determining if the note qualifies as a security and associated compliance requirements.

Property Act (Cap. 242): Governs property rights and interests in Singapore. Relevant when the promissory note is secured by property.

Moneylenders Act (Cap. 188): Regulates moneylending activities. May be applicable if the note involves certain types of lending arrangements.

Companies Act (Cap. 50): Relevant for corporate securities and when either party is a company. Contains provisions about company charges and securities.

Registration of Deeds Act (Cap. 269): Governs the registration of instruments affecting land. Important if the security involves real property.

Conveyancing and Law of Property Act (Cap. 61): Contains provisions about property transactions and securities. Essential when the note is secured by real property.

Civil Law Act (Cap. 43): Contains general provisions about civil law matters including contract enforcement and remedies.

Rules of Court: Procedural rules for enforcing the promissory note through Singapore courts if default occurs.

Limitation Act (Cap. 163): Sets time limits for bringing legal actions. Important for enforcement and validity period of the note.

Stamp Duties Act: Governs stamp duty requirements for legal documents. Relevant for proper execution and registration of the note.