Yes, I have the Rio Grande edition. The Swiss Bank rule is listed under the Investor section. Later in my copy of the rules is a section titled "New Edition Rule Changes". I am including this sections text below because I cannot find this version of the rule book available for download.
New Edition Rule Changes
This new edition introduces the Swiss Bank. Players who do not control any government get a Swiss Bank instead. In addition to additional chances to invest (as before), this also gives the right to prevent other nations from passing over the Investor space on the rondel if the nation's treasury contains sufficient cash for all payouts.
Each nation has an additional bond of 30 million (interest 9 million) available. Now it takes longer for all bonds of a nation to be sold out.
Tax regions are marked with a flag (there are 15 flags per nation instead of 10 chips).
Starting distribution of bonds
Each player starts with two bonds of 9 and 2 milliopn, and 2 million cash as additional starting money. Now it takes longer for a change of government to be possible. The special rule of the second edition (which required paying an additional 1 million when taking over the last government before it had taxed) is no longer applied. The variant for experienced players remains unchanged.