How we cite our quotes: (Section.Sentence)
Quote #4
And be it further enacted, That in case a constitution and state government shall be formed for the people of the said territory of Missouri, the said convention or representatives, as soon thereafter as may be, shall cause a true and attested copy of such constitution or frame of state government, as shall be formed or provided, to be transmitted to Congress. (7.1)
The ultimate federal power play, Section 7 forces any potential draft of Missouri's state constitution to require Congressional approval. They couldn't just up and subvert the U.S. Constitution, and they couldn't formally join the Union without Congressional approval. Basically Congress was holding all the cards: they didn't have to let Missouri in, and they certainly didn't need to do so under any terms but their own.
If Missouri wanted in, they had to play by the rules.
Quote #5
That in all that territory ceded by France to the United States, under the name of Louisiana, which lies north of thirty-six degrees and thirty minutes north latitude, not included within the limits of the state, contemplated by this act, slavery and involuntary servitude, otherwise than in the punishment of crimes, whereof the parties shall have been duly convicted, shall be, and is hereby, forever prohibited: Provided always, That any person escaping into the same, from whom labour or service is lawfully claimed, in any state or territory of the United States, such fugitive may be lawfully reclaimed and conveyed to the person claiming his or her labour or service as aforesaid. (8.2)
If Section 7 was designed to maintain Congressional power over the state legislature, Section 8 was Congress flexing its federal muscles. In one stroke, Congress divided the U.S. and determined the way in which a state could qualify as a slave state. It was an exercise in federal authority that would come to haunt the U.S. forty years later.