[Windows Phone 7 Development and Hacking] jandevries12:
I opened this HTCProvisionDrv.dll in a hex editor and indeed found some pieces of content that proof Heathcliff74's point.

Like this piece of provxml:

<wap-provisioningdoc>
<characteristic-query type="CM_CellularEntries"/>
<characteristic-query type="CM_ProxyEntries"/>
<characteristic-query type="CMPolicy"/>
<characteristic-query type="NAPDEF"/>
<characteristic-query type="PXLOGICAL"/>
<characteristic type="Registry">
<characteristic-query type="HKCU\Software\Microsoft\ShortMsg\MMS\Profiles" />
</characteristic>
</wap-provisioningdoc>

And something that looks like a whitelist:

wap-provisioningdoc/characteristic[@type="BrowserFavorite"]
wap-provisioningdoc/characteristic[@type="Hotspot"]
wap-provisioningdoc/characteristic[@type="CMPolicy"]
wap-provisioningdoc/characteristic[@type="CM_CellularEntries"]
wap-provisioningdoc/characteristic[@type="CM_ProxyEntries"]
wap-provisioningdoc/characteristic[@type="NAPDEF"]
wap-provisioningdoc/characteristic[@type="PXLOGICAL"]
wap-provisioningdoc/characteristic[@type="APPLICATION"]

wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKLM\\Software\\OEM\\RIL"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKLM\\ControlPanel\\Phone"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKCU\\ControlPanel\\Phone"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKLM\\Security\\ECallWithSIM"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKLM\\Security\\ECallWithoutSIM"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKCU\\Software\\Microsoft\\Vmail"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKLM\\Software\\HTC\\operatorpkg"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKLM\\Comm\InternetSharing\\Settings"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKLM\\System\\Platform\\DeviceTargetingInfo"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKCU\\Software\\Microsoft\\Photos\\LockScreen"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKCU\\Software\\Microsoft\\ShortMsg\\MMS\\Settings"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKLM\\Software\\Microsoft\\Internet Explorer\\First Run"]
wap-provisioningdoc/characteristic[@type="Registry"]/characteristic[@type="HKCU\\Software\\Microsoft\\Internet Explorer\\SearchProviders\\SearchProvider1"]

And something that looks like a blacklist:

wap-provisioningdoc/characteristic[@type="Registry"]/nocharacteristic[@type="HKCU\\Software\\Microsoft\\Internet Explorer\\SearchProviders\\SearchProvider1"]
wap-provisioningdoc/characteristic[@type="Registry"]/nocharacteristic[@type="HKCU\\Software\\Microsoft\\ShortMsg\\MMS\\Profiles"]

wap-provisioningdoc/nocharacteristic[@type="CMPolicy"]
wap-provisioningdoc/nocharacteristic[@type="CM_CellularEntries"]
wap-provisioningdoc/nocharacteristic[@type="CM_ProxyEntries"]
wap-provisioningdoc/nocharacteristic[@type="NAPDEF"]
wap-provisioningdoc/nocharacteristic[@type="PXLOGICAL"]

The driver also references an XML file that is located in the Windows directory, called:

\Windows\Query_QUERYALL.xml

This contains the following piece of provxml:

<wap-provisioningdoc>
<characteristic-query type="CM_CellularEntries"/>
<characteristic-query type="CM_ProxyEntries"/>
<characteristic-query type="CMPolicy"/>
<characteristic-query type="NAPDEF"/>
<characteristic-query type="PXLOGICAL"/>

<!-- Query MMS REG setting -->
<characteristic type="Registry">
<characteristic-query type="HKCU\Software\Microsoft\ShortMsg\MMS\Profiles" />
</characteristic>
</wap-provisioningdoc>

Hope this helps!