Stock brokers may underwrite using own funds, limited to twenty times net worth, and must subscribe within 45 days. Stock brokers may act as underwriters only using their own net worth/funds, must not derive benefits other than agreed commission or brokerage, and may not have total underwriting obligations exceeding twenty times their net worth. If called to subscribe under an underwriting agreement, they must do so within 45 days of intimation. Each underwriting engagement must be governed by a valid agreement specifying term, duties, amount of obligations, subscription period, commission, and any arrangements to fulfil obligations, and brokers must comply with applicable regulations under the Act.