The UCI has now published a document with the list of the qualified countries, and their respective quotas of riders, in a.o. the Men Elite category for the road race at the 2013 Road World Championships. Said document can be found here; it contains only the number of riders per nation, but does not explain how these conclusions were reached.

The UCI’s quotas differ from those we published earlier on this site. Our calculations were made based on what we feel is the only interpretation of the rules that would satisfactorily explain all previous instances where a nation in the WT top-10 didn't have 9 riders classified in the individual ranking, thus evoking rules * and **.
 

The interpretation apparently chosen by the UCI is inconsistent with the case of Kazakhstan in 2010, who - if the UCI interpretation is to be followed - should have been awarded 9 starters back then, instead of the 6 they got.

It has not been possible to get a clarifying comment from the UCI on this matter.

Here is the list of countries qualified for the world championships, and the number of riders they may start, according to the UCI:
Spain: 9 riders

Colombia: 9 riders

Italy: 9 riders

Netherlands: 9 riders

Australia: 9 riders

France: 9 riders

Poland: 9 riders

Switzerland: 9 riders

Great Britain: 8 riders

United States: 7 riders

Czech Republic: 7 riders

Belgium: 7 riders

Slovakia: 6 riders

Morocco: 6 riders

Venezuela: 6 riders

Iran: 6 riders

Ukraine: 6 riders

Germany: 6 riders

Slovenia: 6 riders

Austria: 6 riders

Ireland: 4 riders

Eritrea: 3 riders

Algeria: 3 riders

Brazil: 3 riders

Mexico: 3 riders

Canada: 3 riders

Kazakhstan: 3 riders

Hong Kong: 3 riders

Malaysia: 3 riders

New Zealand: 3 riders

Russia: 3 riders

Denmark: 3 riders

Sweden: 3 riders

Norway: 3 riders

Portugal: 3 riders

Croatia: 3 riders

Turkey: 3 riders

Latvia: 3 riders

Costa Rica: 3 riders

Estonia: 3 riders

Lithuania: 3 riders

South Africa: 2 riders

Belarus: 1 rider

Finland: 1 rider

Luxembourg: 1 rider

Tunisia: 1 rider

Argentina: 1 rider

Ecuador: 1 rider

Serbia: 1 rider

Hungary: 1 rider

Bulgaria: 1 rider

Romania: 1 rider

Moldova: 1 rider

Greece: 1 rider