Google GMS CTS issue

[crmchan]

Dear all,

When product plan to certain market is launched, then the CTS guy would submit the target country and ID card/ CMF file to google.
If it's approved, the google would provide Google Signature and Google addendum to the vendor.Is that right?The flow is shown in the picture below.

>>Which kind the Signature is?
>>How long it would take?
>>I found the file common.mk in the folder(/device/qcom/common/common.mk)
There is a sentence listed below,whether it's the default signature key for Qualcomm?

PRODUCT_PRIVATE_KEY := device/qcom/common/qcom.key