The ServiceAdmissionControlFault element cannot have "xsi:nil" as an attribute.
The ServiceAdmissionControlFault element in XML instance can be substituted with other elements.
XML Instance
Service admission control fault. This fault is generated if
admitting this service request would exceed the admission limit for
the specified service.
The rate limit that would be exceeded if this request
was admitted. This limit is measured in tokens per second. This
limit can be related to the number of allowed messages per
second by divided the number of tokens by the weight of the
service operation.
<xhtml:p>Service admission control fault. This fault is generated if
admitting this service request would exceed the admission limit for
the specified service.</xhtml:p>