This part governs applications filed under 49 U.S.C. 10907. The Board can require the sale of a rail line to a financially responsible person. A rail line is eligible for a forced sale if it appears in category 1 or 2 of the owning railroad's system diagram map (but the railroad has not filed an application to abandon the line), or the public convenience and necessity, as defined in 49 U.S.C. 10907(c)(1), permit or require the sale of the line.