Buy-back obligations: companies must ensure truthful disclosures and restrict issuance and promoter trading until offer closure. Regulation 19 requires that companies conducting a buy-back ensure truthful, director certified disclosure in the letter of offer and publicity; refrain from issuing further shares or specified securities until the offer closes; pay consideration only in cash; not withdraw the offer after filing the draft letter or making the public announcement; restrict promoter dealings in listed securities from resolution to closure; and generally not raise capital for one year post closure except to meet subsisting obligations. Additional obligations include nomination of a compliance officer, reporting extinguished certificates to exchanges within seven days, prohibition on buying locked in or non transferable securities, and specified post completion public disclosures.