Principal Shortfalls shall have the meaning specified in Section 4.04.
Available Principal Collections means, with respect to any Monthly Period, an amount equal to the sum of (a) (i) an amount equal to the Principal Allocation Percentage of Series 2018-4 Allocable Principal Collections received during such Monthly Period minus (ii) the amount of Reallocated Principal Collections with respect to such Monthly Period which pursuant to Section 4.08 are required to fund the Required Amount for the related Distribution Date, (b) any Shared Principal Collections with respect to other Series that are allocated to Series 2018-4 in accordance with Section 4.04 of the Agreement and Section 4.11 of this Supplement, and (c) any other amounts which pursuant to Section 4.05 or 4.07 of this Supplement are to be treated as Available Principal Collections with respect to the related Distribution Date.