Understand the hidden meaning of a clause in residential property agreement

Below is the clause mentioned in the agreement "The Promoter shall give possession of the said Apartment to the Allottee/s on or before. 30November-2019 The Promoter also confirms that it will complete the project / phase relating to completion of Plot C on or before 28-February-2021. If the Promoter fails or neglects to give possession of the Apartment to the Allottee/s on account of reasons beyond his control and of his agents by the aforesaid date i.e. 31-May-2020 then the Promoter shall be liable on demand to refund to the Allottee/s the amounts already received by him in respect of the Apartment with interest at the same rate as specified in the rules under RERA read with the rules, herein above from the date the Promoter received the sum till the date the amounts and interest thereon is repaid." The catch is that on RERA, committed date of completion for the entire phase is Feb 2021. I am trying to understand with the above clause will the builder be liable for compensation if possession gets delayed from 31st May 2020 or since date mentioned is RERA is 2021, he will not be liable for compensation.