One form of monetary policy that the Fed does is they can change these reserve requirements.

美联储制定的一种货币政策形式是,他们可以改变法定准备金率。

耶鲁公开课 - 金融市场课程节选

In the Basel I there were Tier I capital requirements and they defined Tier I capital as capital in a certain form -it's stockholders equity plus preferred stock.

第一次巴塞尔协议提出了一级资本要求,他们将一级资本定义为,一种特定形式的资本金,就是股东权益加上优先股

耶鲁公开课 - 金融市场课程节选