Compliance - IoTDM does not support accessControlAuthenticationFlag attribute under ACP resource

While trying to configure accessControlAuthenticationFlag (acaf) attribute under ACP resource,

{"m2m:acp":{
"pv":{"acr":[{"acor" : ["admin"],"acop":63,"acco":[{"aclr":{"accr":["1.0","2.0","3.0"]}}],"acaf":"TRUE"}]},"pvs":{"acr":[{"acor" : ["admin"],"acop":63,"acco":[{"aclr":{"accc":["IN","NL"]}}]}]}
}
}

Actual behavior - I am seeing IoTDM responding with following error message
{
"error": "PRIVILEGES(acr) attribute not recognized: acaf"
}

Expected behavior - As "ACP" is the supported resource of IoTDM, so configuring the element and support of corresponding functionality is currently missing and need to be implemented.