@Jay **********
You won't find it in print from the Immigration announcement because the announcement is in no way about changes to existing procedures (because there aren't any). It is giving guidance to immigration officers about how to apply the new, additional, not for everyone, method that immigration put together for those nationals who were screwed by their embassies (UK, US, Australia, Denmark) when those embassies decided to unilaterally stop issuing embassy income letters.
Some of the headlines about that immigration announcement were absolutely horrible for not making that crystal clear from the get go.
The summary provided by Robert Lagas referenced above is a good one without any baseless speculation. Read that. Don't bother to read the stuff that came before that on this topic unless you would like to raise your blood pressure for no reason ;-)