my $href = $main_hash{$val}{$type}{$pegs};
my $T1val = defined $href->{'Section1'}[0] ? $href->{'Section1'}[0] : undef;

##</code><code>##

$T1val = defined ${$main_hash{$val}{$type}{$pegs}{'Section1'}}[0] ? ${$main_hash{$val}{$type}{$pegs}{'Section1'}}[0] : undef;

##</code><code>##

$T1val = ${$main_hash{$val}{$type}{$pegs}{'Section1'}}[0];