Unfortunately it's likely arbitrary rules being imposed by Israeli authorities. Jordanian authorities said:
"Under the evacuation scheme all patients are sent back after medical attention.
^^
I put it to Dr al-Momani that people might find it hard to accept that a child in such a vulnerable condition could be sent back to Gaza in the current conditions.
^^
"No patient is sent back before they finish their medical treatment… the first reason [why they are returned] is that this will allow us to bring more patients from Gaza. We cannot take all of them at once. We have to take them in batches. So far we have taken 18 batches.
^^
"The second reason is that we don't want to contribute in any shape or form to the displacement of Palestinians from their land and all patients are told… after treatment you are sent back so other patients and other children can be brought in for treatment."
Also on returning to Gaza;
"The Jordanian authorities gave Siwar's family a supply of 12 cans of the hypoallergenic Neocate formula on their departure for Gaza. However her mother Najwa told us that Israeli officials confiscated much of what they'd been given - nine of their 12 cans were taken.
"They told us, 'It is forbidden to take more than these cans,'" said Siwar's mother, Najwa Ashour. "Even though it is therapeutic milk and they said that treatment is allowed, yet they took them."