Change in SDV requirements

Are there any nice and quick ways to vary the amount of SDV required? We have a study that requires 100% SDV for the first 4 subjects at each site, then if all is well, SDV of limited CRFs after that. The different sites reach their 4th subject at different time, so we cannot simply change the SDV requirements. We have dozens of Events and scores of CRFs. I can only think of creating a second similar set of Events with the SDV requirement mainly removed from CRFs, extra complexity for data checker to ensure the correct CRFs are available for input, extra merging for statisticians after extraction, so not a good idea at all..... or simply not doing the SDV even though it says it is required! Would ignoring the 100% SDV setup have any impact on being able to sign or lock Events? thank you!
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