(a) in the case of a highway returned fully to public use within the period beginning  with 12am and ending with 7:59am on a working day, 10am on the same day;  (b) in the case of a highway returned fully to public use within the period beginning  with 8am and ending with 4:30pm on a working day, two hours after that full  return;  (c) in the case of a highway returned fully to public use within the period beginning  with 4:31pm and ending with 11:59pm on a working day, 10am on the next  working day;  (d) in the case of a highway returned fully to public use on a day that is not a working  day, 10am on the next working day.”.  (a) in paragraph (3), before “day”, in both places it occurs, insert “working”;  (b) in paragraph (4) (including in Table 1)—  (i) before “days”, in both places it occurs, insert “working”;  (ii) before “day”, in both places it occurs, insert “working”;  (c) in paragraph (5), in Table 2 after “(each” insert “working”;  (d) in paragraph (9)(b) after “next” insert “working”;  (e) in paragraph (11) omit “in writing”.  (4) In regulation 7 after “shall be two” insert “working”.  (5) In regulation 9—  (6) In regulation 10(3) before “days”, in both places it occurs, insert “working”.  (7) In regulation 11(3) after “shall be 2” insert “working”.  (8) Omit regulation 14.  (9) For regulation 15 substitute—  15. —(1) A notice under these Regulations must be given by means of the Department for  Transport’s digital service for planning and managing roadworks.  (2) Where a notice cannot be given by that means, it may be given by another means of  electronic communication.  (3) A notice given pursuant to paragraph (2) must be given—  (a) by sending it to an electronic address which has been agreed with the recipient for  that purpose, or  (b) if there is no such agreement, by sending it to—  (i) any email address published for the time being by the recipient as an address  for contacting the recipient, or  (ii) if there is no such published address, any email address by means of which the  person proposing to send the electronic communication believes, on  reasonable grounds, that the notice will come to the attention of any director  or other officer of the recipient.  (a) capable of being accessed by the recipient,  (b) legible, and  (c) in a form sufficiently permanent to be used for subsequent reference.  (4) An electronic communication must be—  (5) Where a notice cannot be given by another means of electronic communication in  accordance with paragraph (3), it may be given by any other means of service agreed  between the person giving the notice and the recipient.  “Service of notices, etc  11