Please help me the meaning of the following paragraph:
"If the Participant has not accepted an Offer before the expiry date set out in the Offer, the Offer shall lapse and no purported Acceptance by the Participant of such Offer after such date will be effective"

Is the phrase"after such date will be effective" mean that: No action is acceptance.

During the expiry date if the Participant has no action (accept or not) means that the participant has accepted the Offer.