Treaties — Operation and enforcement of — Through municipal legislation and contract — Migrant Labor Agreement — Incorporation in contract — Interpretation of treaty — By reference to purpose of Agreement — Mandatory and directory provisions — The law of the United States of America.

Disputes — Negotiation — Joint investigation — Alleged violation of Migrant Labor Agreement — Interpretation of Agreement — By reference to its purpose — Mandatory and directory provisions — Time — limit for completion of joint investigation.

Treaties — Interpretation of — Principles and rules of — Interpretation by reference to purpose of Parties — Mandatory and directory clauses — Incorporation in municipal law — Inclusion in contract — The law of the United States of America.