diff --git a/src/common/micro/modd_nebn.F90 b/src/common/micro/modd_nebn.F90
index 459b4cfbde61dc4f59027c29b6f8d286d4ecbff7..51cebc5604b4c88ad05d87bbd0da1e80afae48e6 100644
--- a/src/common/micro/modd_nebn.F90
+++ b/src/common/micro/modd_nebn.F90
@@ -165,6 +165,11 @@ IF(PRESENT(KPRINT      )) IPRINT      =KPRINT
 !       -----------------
 !
 IF(LLDEFAULTVAL) THEN
+  !NOTES ON GENERAL DEFAULTS AND MODEL-SPECIFIC DEFAULTS :
+  !- General default values *MUST* remain unchanged.
+  !- To change the default value for a given application,
+  !  an "IF(HPROGRAM=='...')" condition must be used.
+
   !Freezing between 0 and -20. Other possibilities are 0/-40 or -5/-25
   XTMAXMIX    = 273.16
   XTMINMIX    = 253.16
diff --git a/src/common/micro/modd_param_icen.F90 b/src/common/micro/modd_param_icen.F90
index 78100cba203bd7c09ec7c9dd083fbd34edc79522..af4d288bf3fb22e92feae57a47466e81eaeba642 100644
--- a/src/common/micro/modd_param_icen.F90
+++ b/src/common/micro/modd_param_icen.F90
@@ -297,6 +297,11 @@ IF(PRESENT(KPRINT      )) IPRINT      =KPRINT
 !       -----------------
 !
 IF(LLDEFAULTVAL) THEN
+  !NOTES ON GENERAL DEFAULTS AND MODEL-SPECIFIC DEFAULTS :
+  !- General default values *MUST* remain unchanged.
+  !- To change the default value for a given application,                                                 
+  !  an "IF(HPROGRAM=='...')" condition must be used.
+
   LWARM=.TRUE.
   LSEDIC=.TRUE.
   LDEPOSC=.FALSE.
diff --git a/src/common/micro/modd_param_lima.F90 b/src/common/micro/modd_param_lima.F90
index b1f61e2ee906b3435c2be346af927439a7df68d6..04b5ff4ae9efbd921c66e7456cea06d14113faf3 100644
--- a/src/common/micro/modd_param_lima.F90
+++ b/src/common/micro/modd_param_lima.F90
@@ -625,6 +625,11 @@ IF(PRESENT(KPRINT      )) IPRINT      =KPRINT
 !       ----------------- 
 ! 
 IF(LLDEFAULTVAL) THEN 
+  !NOTES ON GENERAL DEFAULTS AND MODEL-SPECIFIC DEFAULTS :
+  !- General default values *MUST* remain unchanged.
+  !- To change the default value for a given application,                                                 
+  !  an "IF(HPROGRAM=='...')" condition must be used.
+
   LNUCL=.TRUE.
   LSEDI=.TRUE.
   LHHONI = .FALSE.
diff --git a/src/common/turb/modd_param_mfshalln.F90 b/src/common/turb/modd_param_mfshalln.F90
index d946794f87a0f68585b130bae751b2e40a74e0d4..664812c582f179a458ab25c786b1c0db22964a46 100644
--- a/src/common/turb/modd_param_mfshalln.F90
+++ b/src/common/turb/modd_param_mfshalln.F90
@@ -248,6 +248,11 @@ IF(PRESENT(KPRINT      )) IPRINT      =KPRINT
 !       -----------------
 !
 IF(LLDEFAULTVAL) THEN
+  !NOTES ON GENERAL DEFAULTS AND MODEL-SPECIFIC DEFAULTS :
+  !- General default values *MUST* remain unchanged.
+  !- To change the default value for a given application,                                                 
+  !  an "IF(HPROGRAM=='...')" condition must be used.
+
   XIMPL_MF=1.
   CMF_UPDRAFT='EDKF'
   CMF_CLOUD='DIRE'
diff --git a/src/common/turb/modd_turbn.F90 b/src/common/turb/modd_turbn.F90
index 58145676730acb5057d7b64792717220d075fb59..13756ffc74279c9fe2c896d12104b38d8b028852 100644
--- a/src/common/turb/modd_turbn.F90
+++ b/src/common/turb/modd_turbn.F90
@@ -297,6 +297,11 @@ IF(PRESENT(KPRINT      )) IPRINT      =KPRINT
 !       -----------------
 !
 IF(LLDEFAULTVAL) THEN
+  !NOTES ON GENERAL DEFAULTS AND MODEL-SPECIFIC DEFAULTS :
+  !- General default values *MUST* remain unchanged.
+  !- To change the default value for a given application,                                                 
+  !  an "IF(HPROGRAM=='...')" condition must be used.
+
   XIMPL     = 1.
   XTKEMIN   = 0.01
   XCED      = XUNDEF