Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r2e6c750c202b7361d79488ce383e34f380e75413 -r169b72cc9c959b53b40b48e9ce0a5f4aeca1de97
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 2e6c750c202b7361d79488ce383e34f380e75413)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 169b72cc9c959b53b40b48e9ce0a5f4aeca1de97)
@@ -128,7 +128,6 @@
     data[ msgSize++ ] = MESSAGE_SYNC_BYTE;
 
     // set sequence # and ACK bit (unless this is an ACK to a received message)
-#ifndef ACK_NOT_IMPLEMENTED
     if ( msg.hdr.msgID != MSG_ID_ACK )
     {
         // thread protect next sequence # access & increment
@@ -141,7 +140,6 @@
             msg.hdr.seqNo *= -1;
         }
     }
-#endif
 
     // calculate message CRC
     crc = crc8( (U08*)(&msg), sizeof( MESSAGE_HEADER_T ) + msg.hdr.payloadLen );
@@ -165,7 +163,6 @@
         data[ msgSize++ ] = 0;
     }
 
-#ifndef ACK_NOT_IMPLEMENTED
     // if ACK required, add to pending ACK list
     if ( TRUE == ackReq )
     {
@@ -175,7 +172,6 @@
             SET_ALARM_WITH_1_U32_DATA( ALARM_ID_SOFTWARE_FAULT, SW_FAULT_ID_MSG_PENDING_ACK_LIST_FULL )
         }
     }
-#endif
 
     if ( FALSE == error )
     {
@@ -186,7 +182,6 @@
     return result;
 }
 
-#ifndef ACK_NOT_IMPLEMENTED
 /*************************************************************************
  * @brief sendACKMsg
  * The sendACKMsg function constructs and queues for transmit an ACK message \n
@@ -216,7 +211,6 @@
 
     return result;
 }
-#endif
 
 // ***********************************************************************
 // ********************* MSG_ID_OFF_BUTTON_PRESS *************************