1. There is no maximum. The government traditionally process naturalization papers in 5-10 months.
2. I 'm missing the difference between question 1 & question 2.
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Your questions are hard to understand, even more so to answer. One, an LPR, married to a USC becomes eligible for Naturalization application on a third anniversary of the admission into the USA as an either CP or LPR. CR however, would first need to remove conditions. The time USCIS would take to process the N-400 can be looked up on www.uscis.gov.
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