保卫天安门广场指挥部 is treated in the Free China 1989 archive as a later Square command organization, distinct from the May 19–22 joint temporary command and from the earlier hunger-strike structures.
Working period
The current controlled crosswalk uses approximately May 24, 1989 as a working formation anchor and June 4 as the operational endpoint of the Square phase. Exact formation, succession and authorization remain under continuing source reconstruction.
People
Source-controlled names associated with the later command include Chai Ling / 柴玲, Li Lu / 李录, Feng Congde / 封从德, Guo Haifeng / 郭海峰 and others pending role-level verification.
Authority and succession
The archive does not assume that formation of this later command automatically inherited every authority of 北高联, 外高联, the hunger-strike structures or the earlier joint command. The relationship among factual control, representative authorization, broadcast access, finance, logistics and withdrawal decisions is reconstructed separately.
Evidence status
Existence and later-Square role: established. Exact formation procedure, representative mandate and succession from earlier bodies: disputed or incomplete by issue. Public claims are therefore date- and source-bounded.