This field specifies the mode of access which the program requires to the parameter. It is used to restrict access to parameters handled by PAR routines or by DAT_ASSOC.
Note that the field has no effect for facilities such as NDF, FIO and GKS which only use the parameter system to get the name of a file or device which is accessed by other means. The access mode applies to the parameter itself, not to any file or device, etc. that the parameter refers to.
The field has the form:
where mode is a character string which may be:ACCESS mode
Thus if a program does not modify the parameter, READ should be specified in the Interface File. If the value is to be written or modified, then WRITE or UPDATE should be specified.
If the ACCESS field is omitted, UPDATE is assumed.
ADAM Interface Module Reference Manual