Keep in mind that this is a summary of the actual payment schedule. Even when a loan is covered by 18(s) and you are in compliance with that section, you still need to know all the information required by 18(g). Without the fully-expanded payment schedule, you cannot verify the Total of Payments, Finance Charge, and APR. Although the full schedule may not be disclosable when 18(s) applies, failure to retain it constitutes a violation of Section 1026.25--which requires "evidence of compliance" with all parts of Regulation Z that apply to each closed-end loan.
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...gone fishing.