Retrieve rulesets for creating a contract change

This API endpoint allows you to get the ruleset for creating a contract change for an engagement of a particular country, engagement type and contracting type. Use country_code with engagement_type and contracting_type to get more detailed rules. Alternatively, use engagement_id (on its own) to fetch the ruleset relating to a specific engagement. Either engagement_id or country_code with engagement_type are required. contracting_type is only required when engagement_type is contract.