Daniel Taylor of the Wharton School weighed in on stock-trading methods that protect executives from allegations of insider trading. "Some amount of chicanery is legal. And it is the looseness in the rules covering 'pre-planned' stock sales that are to blame," he said.
https://www.reuters.com/business/five-legal-questions-raised-by-elon-musks-unorthodox-share-sales-2021-11-11/ Reuters