2.3—(1) The sheriff may relieve a party from the consequences of failure to comply with a provision in this Part which is shown to be due to mistake, oversight or other excusable cause, on such conditions as he thinks fit.
(2) Where the sheriff relieves a party from the consequences of a failure to comply with a provision in this Part of these Rules under paragraph (1), he may make such order as he thinks fit to enable the summary application to proceed as if the failure to comply with the provision had not occurred.