Htin Kyaw takes power from former general Thein Sein who has helmed far-reaching reforms since 2011.

Suu Kyi, 70, is barred from becoming president by the junta-scripted constitution but has declared that she will steer the government anyway.

The handover at the junta-built parliament in the capital Naypyidaw marks the final act of a prolonged transition since Suu Kyi's National League for Democracy party swept the November elections.

The NLD won 80 percent of parliamentary seats, handing them a massive public mandate to rule after generations of army domination.
Wearing a collarless shirt in the NLD's peach-coloured parliamentary colours, the bespectacled Htin Kyaw pledged to be "faithful to the people of the republic of the union of Myanmar".

"I will uphold and abide by the constitution and its laws. I will carry out my responsibilities uprightly and to the best of my ability," added the 69-year-old, who is an old school friend of the Nobel Laureate.

The Southeast Asian nation of 51 million people is in the throes of a dramatic transformation as it emerges from domination by paranoid and repressive generals who cut the country off from the outside world.

As a result expectations for an NLD-dominated government run high, but Myanmar's new rulers face a steep task.

Investors and tourists have begun to pile in as many of the junta's worst repressions have eased promising a better future to a public who now have access to mobile phones, cheaper cars and other coveted consumer goods.

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