How to set a discount for 3 sections with products?

Question

1C-Bitrix

There are many sections with product groups.
You need to set the same discount for 3 sections.
If you write like this
$IBLOCK_SECTION_ID= 13
then everything is fine, but when I try to specify several sections, for example, like this
$IBLOCK_SECTION_ID= [13,14,15];
That discount is placed on the goods themselves with this id.
Please tell me how can I specify several sections at once?

Answer 1

In your condition it is indicated that you are checking the elements of the infoblock. Apparently you need to do this:

[
    "CLASS_ID" => "CondIBSection",
    "DATA" => [
        "logic" => "Equal",
        "value" => $IBLOCK_SECTION,
    ]
]