The language used in a PP/ST should not distract or confuse the reader. Constant shifts between U.S. and International English spelling could do just that.

To address this interpretation, the following changes are made to CEM v1.0 Part 2 (additions marked thusly; deletions marked thusly):

• Subclause 3.4.5.2.1, Action APE_REQ.1.1E, Work Unit APE_REQ.1-11, para 225, item "c)", 3rd paragraph is modified as follows:
  

  A special case of refinement is an editorial refinement, where a small change is made in a requirement, i.e. rephrasing a sentence due to adherence to proper English grammar or changing the element to use a consistent spelling convention (U.S. English or International English). This change is not allowed to modify the meaning of the requirement in any way.

• Subclause 3.4.5.2.1, Action APE_REQ.1.1E, Work Unit APE_REQ.1-11, para 225, item "c)", last paragraph is modified as follows:
  

  The evaluator is reminded that editorial refinements have to be clearly identified (see work unit APE_REQ.1-10). It is acceptable for editorial refinements for the purposes of achieving a consistent spelling style to be identified once (at the start of the enumeration of the requirements), so as not to clutter the requirements presentation.

• Subclause 4.4.6.3.1, Action ASE_REQ.1.1E, Work Unit ASE_REQ.1-12, para 415, item "c)", 3rd paragraph is modified as follows:

  A special case of refinement is an editorial refinement, where a small change is made in a requirement, i.e. rephrasing a sentence due to adherence to proper English grammar or changing the element to use a consistent spelling convention (U.S. English or International English). This change is not allowed to modify the meaning of the requirement in any way.

• Subclause 4.4.6.3.1, Action ASE_REQ.1.1E, Work Unit ASE_REQ.1-12, para 415, item "c)", last paragraph is modified as follows:

  The evaluator is reminded that editorial refinements have to be clearly identified (see work unit ASE_REQ.1-10). It is acceptable for editorial refinements for the purposes of achieving a consistent spelling style to be identified once (at the start of the enumeration of the requirements), so as not to clutter the requirements presentation.