Rules & documentation

Rule amendments support expanded membership and access to critical national infrastructure

These changes took effect on February 9, 2026.

A series of amendments to the Automated Clearing Settlement System (ACSS) rules are now in effect. These changes, which became effective on February 9, 2026, are designed to align with recent legislative updates to the Canadian Payments Act (CP Act) and refine and enhance operations and processing procedures.

Payments Canada’s rules, standards and procedure documents are updated regularly and versions posted online are in force. You can contact Payments Canada for confirmation by e-mail at info@payments.ca.

Item Title Updated System
Rule 15
Cross-border Arrangements
High-value payment system - Lynx
Rule 16
Remittance information
High-value payment system - Lynx
TSP-001
Lynx MT payment message types and formats
High-value payment system - Lynx
TSP-002
Lynx emergency procedures
High-value payment system - Lynx
TSP-003
Lynx system parameters
High-value payment system - Lynx
TSP-004
Lynx throughput target
High-value payment system - Lynx
TSP-005
Lynx MX payment message types and formats
High-value payment system - Lynx