diff --git a/eive_tmtc/tmtc/acs/imtq.py b/eive_tmtc/tmtc/acs/imtq.py
index fbdf7c6..3c363f7 100644
--- a/eive_tmtc/tmtc/acs/imtq.py
+++ b/eive_tmtc/tmtc/acs/imtq.py
@@ -28,10 +28,18 @@ from tmtccmd.util.tmtc_printer import FsfwTmTcPrinter
 
 
 class OpCode:
-    ON = ["on"]
-    NORMAL = ["normal"]
-    OFF = ["off"]
-    SET_DIPOLE = ["set_dipole"]
+    ON = "on"
+    NORMAL = "normal"
+    OFF = "off"
+    SET_DIPOLE = "set_dipole"
+    REQUEST_ENG_HK = "hk_os_eng_hk"
+    REQUEST_MGM_RAW = "hk_os_mgm_raw"
+    POS_X_SELF_TEST = "self_test_pos_x"
+    NEG_X_SELF_TEST = "self_test_neg_x"
+    POS_Y_SELF_TEST = "self_test_pos_y"
+    NEG_Y_SELF_TEST = "self_test_neg_y"
+    POS_Z_SELF_TEST = "self_test_pos_z"
+    NEG_Z_SELF_TEST = "self_test_neg_z"
 
 
 class ImtqSetId:
@@ -71,17 +79,17 @@ def add_imtq_cmds(defs: TmtcDefinitionWrapper):
     oce.add(OpCode.OFF, "Mode Off")
     oce.add(OpCode.ON, "Mode On")
     oce.add(OpCode.NORMAL, "Mode Normal")
-    oce.add("3", "IMTQ perform pos X self test")
-    oce.add("4", "IMTQ perform neg X self test")
-    oce.add("5", "IMTQ perform pos Y self test")
-    oce.add("6", "IMTQ perform neg Y self test")
-    oce.add("7", "IMTQ perform pos Z self test")
-    oce.add("8", "IMTQ perform neg Z self test")
+    oce.add(OpCode.REQUEST_ENG_HK, "Request Engineering HK One Shot")
+    oce.add(OpCode.REQUEST_MGM_RAW, "Request MGM Raw HK One Shot")
+    oce.add(OpCode.POS_X_SELF_TEST, "IMTQ perform pos X self test")
+    oce.add(OpCode.NEG_X_SELF_TEST, "IMTQ perform neg X self test")
+    oce.add(OpCode.POS_Y_SELF_TEST, "IMTQ perform pos Y self test")
+    oce.add(OpCode.NEG_Y_SELF_TEST, "IMTQ perform neg Y self test")
+    oce.add(OpCode.POS_Z_SELF_TEST, "IMTQ perform pos Z self test")
+    oce.add(OpCode.NEG_Z_SELF_TEST, "IMTQ perform neg Z self test")
     oce.add(OpCode.SET_DIPOLE, "IMTQ command dipole")
     oce.add("10", "IMTQ get commanded dipole")
-    oce.add("11", "IMTQ get engineering hk set")
     oce.add("12", "IMTQ get calibrated MTM measurement one shot")
-    oce.add("13", "IMTQ get raw MTM measurement one shot")
     defs.add_service(CustomServiceList.IMTQ.value, "IMQT Device", oce)
 
 
@@ -90,19 +98,19 @@ def pack_imtq_test_into(object_id: ObjectIdU32, q: DefaultPusQueueHelper, op_cod
         f"Testing ISIS IMTQ handler with object id: {object_id.as_hex_string}"
     )
 
-    if op_code in OpCode.OFF:
+    if op_code == OpCode.OFF:
         q.add_log_cmd("IMTQ: Set mode off")
         command = pack_mode_data(object_id.as_bytes, Mode.OFF, 0)
         q.add_pus_tc(PusTelecommand(service=200, subservice=1, app_data=command))
-    if op_code in OpCode.ON:
+    if op_code == OpCode.ON:
         q.add_log_cmd("IMTQ: Set mode on")
         command = pack_mode_data(object_id.as_bytes, Mode.ON, 0)
         q.add_pus_tc(PusTelecommand(service=200, subservice=1, app_data=command))
-    if op_code in OpCode.NORMAL:
+    if op_code == OpCode.NORMAL:
         q.add_log_cmd("IMTQ: Mode Normal")
         command = pack_mode_data(object_id.as_bytes, Mode.NORMAL, 0)
         q.add_pus_tc(PusTelecommand(service=200, subservice=1, app_data=command))
-    if op_code == "3":
+    if op_code == OpCode.POS_X_SELF_TEST:
         q.add_log_cmd("IMTQ: Perform positive x self test")
         command = object_id.as_bytes + ImtqActionId.perform_positive_x_test
         q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
@@ -115,7 +123,7 @@ def pack_imtq_test_into(object_id: ObjectIdU32, q: DefaultPusQueueHelper, op_cod
         sid = make_sid(object_id.as_bytes, ImtqSetId.POSITIVE_X_TEST)
         q.add_pus_tc(generate_one_hk_command(sid))
 
-    if op_code == "4":
+    if op_code == OpCode.NEG_X_SELF_TEST:
         q.add_log_cmd("IMTQ: Perform negative x self test")
         command = object_id.as_bytes + ImtqActionId.perform_negative_x_test
         q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
@@ -126,7 +134,7 @@ def pack_imtq_test_into(object_id: ObjectIdU32, q: DefaultPusQueueHelper, op_cod
         sid = make_sid(object_id.as_bytes, ImtqSetId.NEGATIVE_X_TEST)
         q.add_pus_tc(generate_one_hk_command(sid))
 
-    if op_code == "5":
+    if op_code == OpCode.POS_Y_SELF_TEST:
         q.add_log_cmd("IMTQ: Perform positive y self test")
         command = object_id.as_bytes + ImtqActionId.perform_positive_y_test
         q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
@@ -138,7 +146,7 @@ def pack_imtq_test_into(object_id: ObjectIdU32, q: DefaultPusQueueHelper, op_cod
         sid = make_sid(object_id.as_bytes, ImtqSetId.POSITIVE_Y_TEST)
         q.add_pus_tc(generate_one_hk_command(sid))
 
-    if op_code == "6":
+    if op_code == OpCode.NEG_Y_SELF_TEST:
         q.add_log_cmd("IMTQ: Perform negative y self test")
         command = object_id.as_bytes + ImtqActionId.perform_negative_y_test
         q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
@@ -151,7 +159,7 @@ def pack_imtq_test_into(object_id: ObjectIdU32, q: DefaultPusQueueHelper, op_cod
         sid = make_sid(object_id.as_bytes, ImtqSetId.NEGATIVE_Y_TEST)
         q.add_pus_tc(generate_one_hk_command(sid))
 
-    if op_code == "7":
+    if op_code == OpCode.POS_Z_SELF_TEST:
         q.add_log_cmd("IMTQ: Perform positive z self test")
         command = object_id.as_bytes + ImtqActionId.perform_positive_z_test
         q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
@@ -164,7 +172,7 @@ def pack_imtq_test_into(object_id: ObjectIdU32, q: DefaultPusQueueHelper, op_cod
         sid = make_sid(object_id.as_bytes, ImtqSetId.POSITIVE_Y_TEST)
         q.add_pus_tc(generate_one_hk_command(sid))
 
-    if op_code == "8":
+    if op_code == OpCode.NEG_Z_SELF_TEST:
         q.add_log_cmd("IMTQ: Perform negative z self test")
         command = object_id.as_bytes + ImtqActionId.perform_negative_z_test
         q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
@@ -200,7 +208,7 @@ def pack_imtq_test_into(object_id: ObjectIdU32, q: DefaultPusQueueHelper, op_cod
         command = object_id.as_bytes + ImtqActionId.get_commanded_dipole
         q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))
 
-    if op_code == "11":
+    if op_code == OpCode.REQUEST_ENG_HK:
         q.add_log_cmd("IMTQ: Get engineering hk set")
         q.add_pus_tc(
             generate_one_diag_command(
@@ -218,7 +226,7 @@ def pack_imtq_test_into(object_id: ObjectIdU32, q: DefaultPusQueueHelper, op_cod
             )
         )
 
-    if op_code == "13":
+    if op_code == OpCode.REQUEST_MGM_RAW:
         q.add_log_cmd("IMTQ: Get raw MTM hk set")
         q.add_pus_tc(
             generate_one_diag_command(