Is ACL configuration ONCE PER BOOT or ONCE EVER?

Is ACL configuration ONCE PER BOOT or ONCE EVER?https://devzone.nordicsemi.com/f/nordic-q-a/51991/is-acl-configuration-once-per-boot-or-once-everhttps://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf52840%2Facl.html&cp=3_0_0_5_2 states that " This register can only be written once." I am confused if this is "once ever" or "once per boot". Before I start poking at those bits, and possiblyen-USTelligent Community 13Tue, 10 Sep 2019 22:13:39 GMTRE: Is ACL configuration ONCE PER BOOT or ONCE EVER?https://devzone.nordicsemi.com/thread/209039?ContentTypeID=1Tue, 10 Sep 2019 22:13:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:957827eb-5e9c-4fa4-86be-d8c5db95b4d7Turbo J<p>From the PS: "The ADDR, SIZE, and PERM registers can only be written once. All ACL configuration registers are cleared on reset. "</p> <p>In other words: The register can be written once per reset.</p><div style="clear:both;"></div>