The one aspect, which is not a salient feature of genetic code is, its being

Genetic code salient features include: 

i) Some amino acids are coded by more than one codon, hence the code is degenerate.
ii) The codon is read in mRNA in a contiguous fashion. There are no punctuations.
iii) The code is nearly universal: for example, from bacteria to human UUU would code for Phenylalanine (phe). Some exceptions to this rule have been found in mitochondrial codons, and in some protozoans.
iv) code is specific and unambiguious.