Authority of partner contd

Sir the last question which I asked on authority of partner which states that

1)”Implied authority of partner can only be withdrawn if an express clause is stated along with third party notification for restriction on implied authority.”

2)“The firm is not bound by the implied authority of a partner if the third party knows the partner has no express authority,

Sir in the phrase 1 its mentioned that implied authority can be withdrawn if an express clause is stated along with 3rd party notification, however , in phrase 2 its mentioned that implied authority can be withdrawn if the 3rd party knows the partner has no express authority. What I mean to ask is that implied authority would be withdrawn if an express clause is stated, but the express clause will state what? would it state that partner has no implied authority or would it state that partner has no express authority? Also phrase 1 states that “express clause is stated” and phrase 2 states that “partner has no express authority”. Doesn’t it mean different thing?