message distribution at ASP

Hi,

I have a simple question regarding message distribution at ASP.

The RFC 4666 says about message distribution the following:

- at SGP (section 1.4.2.4.): "....by comparing elements of the incoming SS7
message to currently defined Routing Keys in the SGP"

- at ASP (section 1.4.2.5.): "by observing the Destination Point Code (and
possibly other elements of outgoing message, such as the SLS value). The ASP
must also take into account whether the related Routing Context is active or
not"

Do these descriptions converge to the same thing?

Here is one example where I am unsure:
An ASP processes traffic for two ASs:

AS1 ~ RK1 = (DPC X, OPC Y, SI=3)
AS2 ~ RK2= (DPC X, OPC Y, SI=5)

ASP is connected to two SGs, namely SG1 and SG2.
Both SGs have available connection to SS7 destination Y.

ASP is registered and active for AS1 and AS2 at SG1.
ASP is registered and active for AS1 at SG2.

My question is the following:
how message with routing label DPC=Y, OPC=X, SI=5 can be routed from ASP:

a) if we observe Destination PC only, it can be send to either SG1 or SG2
b) if we observe Routing Label and match it to AS, it can be sent over SG1
only 

what is the correct distribution?

thanks,
Dario
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