The Schedules Publication Group (SPG) is responsible for the development procedures and formats for the exchange of schedules data messaging standards, maintained within the Standards Schedules Information Manual (SSIM).

The SPG also recommends amendments to aircraft type codes , airport passenger terminal codes, time zone information and region codes published as part of SSIM standards. For more information, contact:

The SPG meets annually prior to the June Slot Conference. The Slot Conference (SC) is a working conference. As part of the slot process and SSIM standards the conference provides a forum for the allocation of slots at fully coordinated airports (Level 3), and for the reaching of consensus on the schedule adjustments necessary to conform to airport capacity limitations (Level 2).

The SSIM is published annually in March and the SSIM Web Download application will receive updated content throughout the year. The SSIM is the official set of Recommended Practices that guide the industry along mutually compatible lines in the development of schedules/Slots data handling procedures. Full consideration is also given to the needs of those agencies which also require schedule related data, including government departments, airport and air traffic control authorities, timetable publishing agencies, fuel companies, etc. The manual aims to set common standards for external exchanges.

SSIM Chapter 8 - MCT Standards (pdf) - This Chapter describes the formats and rules for the submission and application of MCT for processing under the new IATA mandate. In order to facilitate industry-wide implementation, a range of optional features such as the use of suppressions, codeshare indicators and other optional MCT data elements, have been included.

MCT User Guide (pdf) - This User Guide is intended to help current users understand the new MCT standards. The Guide illustrates and describes, step by step, the process of the MCT request before and after submission.

MCT Technical Guide (pdf) - This guide is to assist development teams in processing the new hierarchy to build itineraries. Examples provided will show how itineraries should build under the new mandate.

Carrier Submission Example Template  (xls) – Order for carriers to submit their MCT data. Template shown in SSIM Chapter 8 section 8.11.

Airport Slots and Coordination Training

In today’s world of rising airport congestion, efficient allocation of available slots is critical. Our practical training will allow you to maximize your slot portfolio management capabilities:

  • Allocate slots according to the requirements and procedures for either facilitated (level 2) airports or coordinated (level 3) airports
  • Apply the standard procedures for communication between airlines and slot coordinators
    Maximize your slot portfolio management capabilities
  • Apply slot procedures and understand the impact of international rules and regulations
    Execute slot messages in compliance with SSIM Chapter 6
  • Analyze capacity constraints and historic slot eligibility

Airport Slots and Coordination Training Course will help you learn how to manage slot communications, allocate and coordinate airport slots by applying IATA's Worldwide Slot Guidelines (WSG) and the Standard Schedules Information Manual (SSIM).

This course is available at IATA Training Centers, regional training partner locations, and on-demand as in-company training. The course is available in both English and Spanish language.

Scheduling Messages

Schedules Publication Messages, Implementation Guides and XML Schemas for the exchange of airline schedules information standards

Slot Messages

Slot Messages, Implementation Guides and XML Schemas for the communication of slot and airport coordination information standards

​Membership and access to the private site

SISC attendance and access to the SISC private site is reserved for Member Airlines and Strategic Partnerships Members registered within the Airline Distribution Standards. Companies and organisations interested in Schedules Information Standards are invited to join our IATA Strategic Partnerships.

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