(Reuters] -Twitter Inc has adopted a plan for limited duration shareholder rights to safeguard itself from Elon Musk’s takeover offer of $43 Billion cash.

Musk submitted the offer on Wednesday to Twitter’s board in a written letter. The microblogging site has grown into a worldwide communication tool for people and leaders. It was published in a regulatory filing Thursday.

Musk suggested that a hostile offer could be made to Twitter (NYSE) after his TED Talk on Thursday. Musk tweeted: “It’d be utterly irresponsible to not put this offer up for a shareholder vote.”

This plan, which is sometimes called the “poison pills” strategy to resist an offer from potential acquirers, will give the right holders the ability to exercise the rights if they acquire 15% or more Twitter common stock.

Twitter stated that the rights plan will end on April 14th, 2023.