The major parties have long issued certifications after each national presidential candidate to each state, for the purpose of informing each state’s elections officials which names to print on the November ballot for president and vice-president for that particular party. Here are the certifications sent to the South Dakota Secretary of State for both major parties from 2004. Here are the certifications from both major parties to South Dakota in 2008. They show that in both 2004 and 2008, the Republican certifications asserted that their nominees met the constitutional qualifications. By contrast, it happens that the Democratic certifications did not discuss whether their nominees met the constitutional qualifications.
The major parties (and minor parties as well) are free to word their certifications any way they wish. No government, federal or state, tells the national parties how to prepare their certifications, or what information they should contain. The information is only relevant because of the assertion made by J. B. Williams a few days ago that for some reason, the Democratic Party national convention officials in 2008 prepared a certification that did assert that the party’s national nominees meet the constitutional qualifications, but then apparently junked that version and went with another version that did not mention the constitutional qualifications.