The law must last several levels of approval and if it contradicts or conflicts with a federal law the law literally can not go in place do to the fact that federal laws are more for everyone than just for the people of a certain area
Answer:
when it gets high pressure
The Blue Nile begins at Lake Tana in Ethiopia and flows into Sudan from the southeast. The two rivers meet just north of the Sudanese capital of Khartoum. The northern section of the river flows north almost entirely through the Sudanese desert to Egypt, then ends in a large delta and flows into the Mediterranean Sea.