Procedural Calendar - ICSID Convention Arbitration
The purpose of the procedural calendar is to establish a schedule for written submissions and oral hearings at the outset of a case. Fixing dates early increases predictability and expedites the proceedings. If a party cannot comply with a time limit established in the calendar, it may request that the Tribunal extend that time limit (Arbitration Rule 26).
A procedural calendar may envisage various scenarios. This may depend on whether a party has raised jurisdictional objections and whether such objections will be heard as preliminary questions (see bifurcation) or with the merits of the dispute (Arbitration Rule 41(4)). The calendar may include alternative scenarios and may anticipate requests for production of documents and other procedures.
Examples of scenarios include:
Filings without Jurisdictional Objections 

Filings with Jurisdictional Objections