Network Solutions domain transfer lock policy?

[Deepak Jain]

I just became aware of an SOP at Network solutions. On a contact change 
to a domain, they automatically transfer lock the domain for 60 days.

I am aware of ICANN-approved behaviors like 60 days lock on new or 
transfered registrations.

This is a new curve ball and seems a little out-of-the-spirit of ICANN 
regulations (last I saw them).

Is anyone aware of this as a kosher activity and is anyone aware of any 
other registrars doing it? Keep in mind, these are legitimate contact 
changes and not suspicious in anyway.

Thanks in advance,

DJ