Optional Duration limit (in seconds) for the transfer. Empty means no limit.

Conditionally Required Defines how to measure the durationLimit.

• Required if durationLimit is defined.
• Forbidden if durationLimit is empty.

Optional Fare product ID for the transfer. If empty, cost is 0 (no transfer cost).

Required Indicates how to combine transfer costs:

• 0 = from-leg cost + transfer cost
• 1 = from-leg + transfer + to-leg cost
• 2 = transfer cost only

Optional The pre-transfer fare leg group (fare_leg_rules.leg_group_id).

• If no exact match is found, empty corresponds to all leg groups not listed under from_leg_group_id.

Optional The post-transfer fare leg group (fare_leg_rules.leg_group_id).

• If no exact match is found, empty corresponds to all leg groups not listed under to_leg_group_id.

Conditionally Forbidden / Required Defines how many consecutive transfers this rule may be applied to.

• -1 means no limit.
• 1 or more = the transfer count this rule applies to.

Forbidden if from_leg_group_id !== to_leg_group_id. Required if from_leg_group_id === to_leg_group_id.