In the absence of express provisions regarding sale in the promissory note or other binding obligation to contribute money or property, the Company may sell, in such manner as the directors may by resolution of directors determine, any share on which the Company has a Lien,
but no sale shall be made unless some sum in respect of which the lien exists is presently payable nor until the expiration of twenty-one days after a notice in writing, stating and demanding payment of the sum presently payable and giving notice of the intention to sell in default of such payment, has been served on the holder for the time being of the share.