Each contractual hierarchy begins with a single framework contract. This is the main element of the first level of sub-admissions in its hierarchy. The sub-agreement must have a type of contract identical or more specific than the contract type of its higher agreement: a sub-agreement always has a superior agreement on this subject directly in the hierarchy, but may itself be a higher agreement on one or more lower sub-agreements in the hierarchy. V. Other. Any communication (“Communication”) sent to the other Party under this Agreement must be made in writing and in English, provided that this Communication relates to the Agreement or other legal matters. .