!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
!                     version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms
!of the Environment Canada - Atmospheric Science and Technology License/Disclaimer
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!
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!See the above mentioned License/Disclaimer for more details.
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!-------------------------------------- LICENCE END --------------------------------------
!

      FUNCTION LCHECNAT(KBKNAT) 6
*
************************************************************************
*
*      PURPOSE:  TO VERIFY IF THE INPUT IS IN THE LIST OF ALLOWED
*                "BKNAT"
*
*    ARGUMENTS:
*                 INPUT:
*
*                       -KBKNAT  : BKNAT (SEE CMC "BANCO" DOCUMENTATION)
*
*
*                OUTPUT: .TRUE. OR .FALSE.
*
*
*       AUTHOR: P. KOCLAS(CMC TEL. 4665)
*
************************************************************************
*
      IMPLICIT NONE
      LOGICAL LCHECNAT
      INTEGER KBKNAT
*=======================================================================
*                   DONNEES  UNI  OU  DONNEES  MULTI
*                          B'0000'                B'0100'
      LCHECNAT = ( KBKNAT .EQ. 0 ) .OR. ( KBKNAT .EQ. 4 )
*=======================================================================
      RETURN
      END