Final answer:
Of the options listed, 'issuing stock dividends to increase the authorized capital stock' is not a requisite for declaring or issuing a stock dividend. Stock dividends distribute existing retained earnings, not increasing the authorized capital stock, contrary to what's mentioned in option D.
Step-by-step explanation:
The question concerns the necessary conditions for a valid declaration and/or issuance of a stock dividend. Among the listed requisites, the existence of original and unissued shares, having existing unrestricted retained earnings, and dividend declaration by the board of directors (BOD) that is approved by a 2/3 vote of the outstanding capital stock (OCSD) are correct. However, issuing stock dividends to increase the authorized capital stock is not a requisite for the declaration and/or issuance of a stock dividend, as stock dividends use existing retained earnings to increase the equity base of shareholders rather than increasing the authorized capital stock.
Firms issue stock for various reasons, such as increasing financial capital for expansion and enhancing visibility in financial markets, but this does not necessarily imply an increase in authorized capital stock. Directors and shareholders play critical roles in decisions regarding stock dividends, and the process often requires expertise from professionals like investment bankers and attorneys, as well as compliance with regulations from agencies like the Securities and Exchange Commission (SEC).