Consider the following statements regarding the World Trade Organization (WTO):

1. The Most-Favoured-Nation (MFN) principle allows countries to give selective trade benefits while imposing higher tariffs on others.

2. Under National Treatment, foreign goods must be treated equally to domestic goods after entering the market.

3. It requires all countries to implement trade liberalization at the same pace without special provisions.

Which of the statements given above is/are correct?