diff --git a/logginghouse-client-requirements.md b/logginghouse-client-requirements.md
index db94845..e18aa41 100644
--- a/logginghouse-client-requirements.md
+++ b/logginghouse-client-requirements.md
@@ -1,14 +1,35 @@
 # LoggingHouse Client Requirements
 
+The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
+      NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and
+      "OPTIONAL" in this document are to be interpreted as described in
+      [RFC 2119](https://datatracker.ietf.org/doc/html/rfc2119).
+
+## Environment Constraints (Phase 1&2)
+- The LH client MUST be implemented as an EDC extension
+- The LH client MUST be developed against MDS EDC 7.x.x
+- The LH client SHOULD NOT interfere with other EDC extensions
+- The LH client repository MUST provide a Maven package for the MDS EDC integration
+
 ## Functional Requirements
-- A LH client SHOULD report every transaction to the LH server
-- A LH client MUST create a process id while negotiating a contract
+- A LH client MUST report every transaction to the LH server (Phase 1 or 2)
+  - ... MUST log Contract Agreements
+  - ... MUST log Transfer init, completed, error ...
+  - ... MAY log query messages, for the purpose of marking audits ... (Phase 2)
+  - ... MAY log other messages
+- A LH client MUST create a process id while negotiating a contract (Phase 1)
   - The process id MUST be accessable (read/write) by provider and consumer.
-- A Connector MUST NOT agree on any contract if it is not able to log a message to the shared process id.
-- A LH client SHOULD NOT transfer any data if the transaction cannot be logged to the LH server.
-- A LH client MUST buffer log messages of transfers if the LH server is unreachable.
-- A LH client SHOULD archive LH server transaction reciept.
-- A LH client MAY query their transaction data from the LH server.
+  - The process id MUST be accessable (read) by the specified MDS connector. (Logginghouse server feature)
+- A Connector MUST NOT agree on any contract if it is not able to log a message to the shared process id. (Phase 2 - TBC MDS Community Management)
+- A LH client SHOULD NOT transfer any data if the transaction cannot be logged to the LH server. (Phase 2)
+  - different behaviour on contract negotiation and transfer  
+- A LH client MUST buffer log messages of transfers if the LH server is unreachable. (Phase 1)
+  - time constraint ... (Phase 2 - TBC)
+  - mechanism to protect against modification of buffered messages ... (Phase 2 - TBC)
+- A LH client MUST push buffered log messages as soon as the LH server is reachable. (Phase 1)
+- A LH client SHOULD archive/store LH server transaction reciept. (Phase 1)
+- A LH client MAY query their transaction data from the LH server. (Phase 1)
+- A LH client MUST expose a query API to enable a connector developler to implement their use case specific functions. (Phase 1)
 
 ## Process Words
 
@@ -16,7 +37,7 @@
 A transaction is either a contract negotiation action or data transfer action.
 
 ### Process id
-A process id is a unique idendifiert to group each transaction to a contract. The LH server enables a LH client to create a process id with the option to specify the owners.
+A process id is a unique identifier to group each transaction to a contract. The LH server enables a LH client to create a process id with the option to specify the owners.
 
 ### LH server
 Is the logging house server that acts a central logging component.