A: AACT 4.2.4 includes a mapping appendix that cross-references SDTM domains (e.g., AE, DM, DS). Many companies use AACT as an internal warehouse format and convert to SDTM for submission.

A: Regulatory rejection leading to 6–12 month approval delays, plus potential warning letters for systematic non-compliance.

Conversely, those who delay migration or attempt superficial compliance risk incurring significant submission delays, regulatory findings, and reputational damage.

But what exactly is AACT 4.2.4, why has it garnered attention from clinical data managers, regulatory affairs specialists, and IT architects alike, and how can your organization implement it effectively?