ISU document (11 pages, dated 17 May 2016):
QUALIFICATION SYSTEM FOR THE XXIII OLYMPIC WINTER GAMES PYEONGCHANG 2018 (individual disciplines and team event)
Copied from page 9:
2) CONFIRMATION AND ENTRY PROCEDURE
If an NOC/ISU Member has two (2) or three (3) entries in an individual OWG competition/discipline then the NOC/ISU Member must confirm the name of the participants who will compete in the Short Program/Short Dance of the Team Event as follows:
Men Single Skating and Pair Skating Short Programs:
Latest at 10:00 a.m., local time on the site of the OWG, the day before the Team Event Men Single Skating and Pair Skating Short Programs [Thursday, Feb. 8].
Ladies Single Skating Short Program and Ice Dance Short Dance:
Latest at 10:00 a.m., local time on site of the OWG, the day before the Team Event Ladies Single Skating Short Program and the Team Event Ice Dance Short Dance [Saturday, Feb. 10].
Free Skating/Free Dance:
For the five (5) Teams qualified for the Free Skating/Free Dance of the Team Event the NOC/ISU Member must declare within the Team Leaders Meeting, scheduled 10 min. after the Team Event Ladies Single Skating Short Program, the names of the pairs skating the Team Event Pair Skating Free Skating segment [Sunday, Feb. 11 at 13:15 in Korea].
During the Team Leaders Meeting at 15:30 h on the day of the Pair Skating Free Skating [Sunday, Feb. 11], the Team Leaders must declare the skater in Men Single Skating, the skater in Ladies Single Skating and the Ice Dance couples, who have been selected to skate the Free Skating/Free Dance segment.
In principle, the skaters/couples competing in the Free Skating must be the same as those having competed in the Short Program/Short Dance, however each Team has the option to replace up to two (2) entries (two Single Skaters or one Single Skater (Lady or Man) plus one couple (Pair Skating or Ice Dance) or both the Pair Skating and Ice Dance Couples) between the Short Program/Short Dance and the Free Skating/Free Dance provided such qualified skaters/couple is part of the accredited delegation on site of the OWG.
ETA:
ISU Communication No. 2134 - OLYMPIC WINTER GAMES 2018 ENTRIES/PARTICIPATION FIGURE SKATING TEAM EVENT INCLUDING CLARIFICATIONS RELATED TO THE FIGURE SKATING TEAM EVENT AND REPLACEMENTS/SUBSTITUTIONS FOR MEDICAL REASONS (Dec. 14,2017)
9. Deadline of Nominations for the Figure Skating Team Event
February 6, 2018 - 10:00
Final confirmation of Skaters/Couples participating (Team Leaders Meeting) in the Team Event. The confirmation includes all skaters/couples available for participation in the Team Event.
With respect to the “exchange possibility” within a Team the following dates and deadlines apply to confirm the
names of skaters/couples (possibility of exchanges) who will skate for the Team in the
segment in question.
February 8, 2018 - 10:00
Nomination by name of the Skaters participating in the Men Single Skating and Pair Skating Short Program Team Event.
February 10, 2018 - 10:00
Nomination by name of the Skaters participating in the Ladies Single Skating and Ice Dance Short Program/Short Dance Team Event.
February 11, 2018 - 13:15
Nomination by name of the Skaters participating in the Pair Skating Free Skating Team Event.
February 11, 2018 - 15:30
Nomination by name of the Skaters participating in the Men Single Skating, Ladies Single Skating and Ice Dance Free Skating/Free Dance Team Event
Skaters/Couples, who suffer an injury or sickness after the deadlines mentioned above - replacement
deadline and the deadline for entering the name for a segment – cannot be replaced or exchanged and
their place, need to remain empty. [/i]
Link to the discussion/speculation thread in the Trash Can:
Olympic Team Event: Strategies and Subs!