Israel has moved the blocks which are supposed to mark its post-ceasefire line of control deeper into Gaza in several places, sowing confusion among Palestinians.
Satellite images reviewed by BBC Verify show that in at least three areas Israel placed blocks, before returning later and moving the positions further into the Strip.
Under the terms of the US-brokered deal with Hamas, Israel agreed to withdraw troops beyond a line marked in yellow on Israeli military maps, which it has illustrated on the ground with concrete yellow blocks.
Defence Minister Israel Katz warned in October that anyone crossing the Yellow Line would be met with fire. Since these comments were made, there have been a series of deadly incidents around the line.
In Beit Lahia, Jabalia and al-Tuffah, the Israel Defense Forces (IDF) placed blocks and later returned to move them deeper inside Gaza. In total, 16 positions were moved.
In the al-Tuffah neighbourhood of Gaza City, satellite images show that IDF troops moved at least seven already placed blocks between 27 November and 25 December. The position of the markers were moved on average 295m (968ft) deeper inside the Strip.
As well as the blocks that have been moved, BBC Verify mapped 205 other markers. More than half of those have been placed significantly deeper inside the Strip than the line marked on maps.
An IDF spokesperson said it rejected all claims that the Yellow Line has been moved or its crossing by IDF troops, adding that they were operating to visually mark the Yellow Line according to ground conditions and operational assessments.
Analysis of satellite images up to 11 January suggests some sections of the Yellow Line remain unmarked on the ground, causing confusion about the actual boundary of what the IDF refers to as a dangerous combat zone.
Last month, a resident near Khan Younis expressed fear after Israeli troops moved blocks near him, stating he felt trapped with no clear understanding of the safety boundaries: The atmosphere at night is terrifying. We hear shells exploding, soldiers advancing, gunfire, and drones buzzing overhead without pause. We are also being shot at directly.
The movement of the blocks has drawn scrutiny, with some experts calling it a tool for territorial engineering. It creates a situation where Israel can continue to exercise control over land without formally acknowledging changes to the borders.
Since Katz's warning in October, there have been several instances where IDF troops shot at individuals crossing the Yellow Line, resulting in fatalities, including a strike near a shelter for displaced people which killed multiple civilians.
The situation has led to growing trepidation among Gaza's residents as they navigate a landscape that is both physically and legally ambiguous.
