Is It Permissible Not To Establish The Sunnahs Of Daily Prayers?

Is it permissible not to establish the sunnahs of daily prayers?

Rawatib sunnahs that are established before and after fardh prayers are divided into two parts as mu’akkadah and ghair mu’akkadah sunnahs. Mu’akkadah sunnahs refer to the sunnah prayers that were established by Prophet Muhammad (saw) all the time but not performed sometimes in order to show that they were not binding while ghair mu’akkadah sunnahs are the sunnahs which were established by him from time to time and not performed at other times. Ghair mu’akkadah sunnahs are also called as mustahab. It is not permissible to not perform mu’akkadah sunnahs without an excuse. If they are not performed without an excuse, it will be a wrongful and faulty act; however, it does not require a punishment. On the other hand, ghair mu’akkadah sunnahs may not be performed sometimes without an excuse (Ibn Abidin, Radd al-Muhtar, I, 218-221; II, 170, 451-453).

Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS