Hanafi
The sources give no view for it here.
الزيادة في الدين والنقص منه
هل يجوز الزيادة في الدين أو النقص منه أو تبديله بعد تمامه؟
Each school’s answer
In our wordsHanafi
Not stated in the sources
Maliki
Not stated in the sources
Shafi'i
Not stated in the sources
Hanbali
Not stated in the sources
The texts
٤٥ - مَسْأَلَةٌ: وَالدِّينُ قَدْ تَمَّ فَلَا يُزَادُ فِيهِ وَلَا يُنْقَصُ مِنْهُ وَلَا يُبَدَّلُ. قَالَ تَعَالَى: {الْيَوْمَ أَكْمَلْتُ لَكُمْ دِينَكُمْ} [المائدة: ٣] وَقَالَ تَعَالَى: {لا تَبْدِيلَ لِكَلِمَاتِ اللَّهِ} [يونس: ٦٤] وَالنَّقْصُ وَالزِّيَادَةُ تَبْدِيلٌ. [مَسْأَلَة بلغ رَسُول اللَّه الدِّين كله كَمَا أمره اللَّه]
From the schools’ own books
Maliki
The sources give no view for it here.
Shafi'i
The sources give no view for it here.
Hanbali
The sources give no view for it here.
What is «in our words» is our standard wording; the books’ texts stay as they are.